| 1890 | Acht Opfer des Klassenhasses — Leben und Sterben der verurtheilten Chicagoer Arbeiterführer | — | German |
| 1892 | The Development of Socialism from Utopia to ScienceFree | Friedrich Engels | English |
| 1892 | Vorwärts✓ | Socialist labor party | German |
| 1894 | Gov. Altgeld's Pardon ...✓Free Labor Library -- No. 12 | Karl Kautsky, Illinois. Governor (1893-1897 : Altgeld) & Lawrence J. Gutter Collection of Chicagoana (University of Illinois at Chicago) | English |
| 1894 | The Capitalist Class✓Free — A Parody Labor Library -- No. 7 | Karl Kautsky | English |
| 1894 | The Co-operative Commonwealth and Why Workmen Are Unemployed?✓Free | Karl Kautsky | English |
| 1894 | The Proletariat✓ Labor Library -- No. 10 | Karl Kautsky | English |
| 1894 | The Religion of Capital and Social Effect of Machinery and Do You Know What "Socialism" Means?✓ Labor Library. February, 1894 -- No. 8 | Paul Lafargue | English |
| 1894 | Untersuchungen über die Raten des Mehrwerths und Profits mit Bezug auf die Lösung des Problems der Durchschnitts-Profitrate✓ Bibliothek Stein / Freie Universität Berlin, Universitätsbibliothek; 229 | Georg Christian Stiebeling | German |
| 1896 | Proceedings of the Ninth Annual Convention of the Socialist Labor PartyFree | Socialist Labor Party | English |
| 1896 | Proceedings of the Ninth Annual Convention of the Socialist Labor Party, Held at Grand Central Palace, 43rd Street and Lexington Ave. New York CityFree | Socialist Labor Party | English |
| 1898 | Assassinations and Socialism✓Free | August Bebel & Boris Reinstein | English |
| 1898 | Assassinations and Socialism, from a Speech by August Bebel, Delivered at Berlin, November 2, 1898✓Free — Translated for the Daily People from the German by Boris Reinstein | August Bebel | English |
| 1898 | The Co-operative Commonwealth✓ Labor Library -- No. 3 | Karl Kautsky | English |
| 1898 | The Co-operative Commonwealth and Why Workmen Are Unemployed!✓ Labor Library; 3 | — | Not recorded |
| 1898 | The Proletariat and Down with the Socialists✓ Labor Library -- No. 10 | Karl Kautsky | English |
| 1898 | What Means This Strike?✓Free — Address Delivered by Daniel DeLeon in the City Hall of New Bedford, Mass., February 11th, 1898 | Daniel De Leon | English |
| 1899 | Reform or Revolution✓Free — Address Delivered Under the Auspices of the People's Union, at Well's Memorial Hall, Boston, January 26, 1896 | Daniel De Leon | English |
| 1899 | The Capitalist Class, and Cappy and Labby. (A Parody)✓ Labor Library -- 7 | Karl Kautsky | English |
| 1899 | The Class Struggle✓ | Karl Kautsky & Bruno Schönlank | English |
| 1899 | The Development of Socialism from Utopia to Science✓Free Labor Library -- No. 5 | Friedrich Engels | English |
| 1899 | What Means This Strike? Address Delivered by Daniel De Leon in the City Hall of New Bedford, Massachusetts, February 11th, 1898✓Free | Daniel De Leon | English |
| 1900 | Reform or Revolution; Address Delivered Under the Auspices of the People's Union ... Boston, Jan. 26, 1896Free | Daniel De Leon | English |
| 1900 | Socialism✓Free — A Paper Read Before the Albany Press Club, "Socialist Night." The people library; 2,11 | William Scholl McClure | English |
| 1900 | Speeches and Editorials✓Free | Daniel De Leon | English |
| 1900 | Th[e] American Farmer✓ Buzz Saw Series -- Vol.1, No.2 | — | English |
| 1900 | The Foundation of the Labor Movement✓ | Wendell Phillips | English |
| 1900 | The Socialist Republic✓ The People Library | Karl Kautsky | English |
| 1900 | The Socialist Trade and Labor Alliance Versus the "Pure and Simple" Trade Union✓ — A Debate Held at the Grand Opera House, New Haven, Conn., November 25, 1900, Between Daniel De Leon Representing the Socialist Trade & Labor Alliance and the Socialist Labor Party, and Job Harriman Representing the "Pure and Simple" Trade Union and the Social Democratic Party ... The People Library | Daniel De Leon | English |
| 1900 | The Working Class (the Proletariat)✓Free | Karl Kautsky | English |
| 1900 | Trades Unionism in the United States, 1742-1905✓Free — Bulwark of Capitalism or Framework of Socialism?: An Historical Glimpse Harvard Social History/business Preservation Microfilm Project -- 24874 | Justus Ebert | English |
| 1900 | Tragic Pages from the History of Strikes Among the Miners✓ The People Library | — | English |
| 1900 | What Is Capital?Free | Ferdinand Lassalle | English |
| 1901 | Il significato di uno sciopero | Daniele de Leon & Camillo Cianfarra | Italian |
| 1901 | Proceedings of the Tenth National Convention of the Socialist Labor Party✓Free — Held in New York City, June 2 to June 8, 1900 | B. F. Keinard | English |
| 1901 | Proceedings of the Tenth National Convention of the Socialist Party, Held in New York City, June 2 to June 8, 1900✓Free — Stenographic Report by B. F. Keinard | Socialist Labor Party. National Convention 1900 : Indianapolis, Ind.) | English |
| 1901 | Socialism, Utopian and Scientific✓Free Arm and Hammer Series | Friedrich Engels | English |
| 1901 | Territorial Expansion✓Free | L. Sanial | English |
| 1901 | Value, Price and Profit✓Free — Addressed to Workingmen. Ed. by His Daughter, Eleanor Marx Aveling. With an Introd. And Annotations by Lucien Sanial | Karl Marx | English |
| 1901 | Value, Price and Profit, by Karl Marx, Addressed to Workingmen✓Free — Ed. by Eleanor Marx Aveling, with an Introduction and Annotations by Lucien Sanial | Karl Marx | English |
| 1902 | Free Trade✓Free — An Address Delivered Before the Democratic Association of Brussels, Belgium, January 9, 1848 | Karl Marx | English |
| 1902 | The Mark✓Free — Written as an Appendix to "Socialism, Utopian and Scientific" | Friedrich Engels | English |
| 1902 | The Paris Commune✓Free — Including the "First Manifesto of the International on the Franco-Prussian War," the "Second Manifesto of the International on the Franco-Prussian War," "the Civil War in France," Arm and Hammer Series | Karl Marx | English |
| 1902 | The Paris Commune, Including the "First Manifesto of the International on the Franco-Prussian War," the "Second Manifesto of the International on the Franco-Prussian War," "the Civil War in France," by Karl Marx ... with Introduction by Frederick Engels✓Free — Preface and Notes to the American Ed. by Lucien Sanial | Karl Marx | English |
| 1902 | Wage-Labor and Capital✓Free Arm and Hammer Series | Karl Marx | English |
| 1903 | ?What Means This Strike?✓Free | Daniel De Leon | English |
| 1903 | Two Pages from Roman History✓Free | Daniel De Leon | English |
| 1903 | Two Pages from Roman History. I. Plebs Leaders and Labor Leaders. II. the Warning of the Gracchi✓Free | Daniel De Leon | English |
| 1904 | Flashlights of the Amsterdam International Socialist Congress✓Free | Daniel De Leon | English |
| 1904 | Franz von Sickingen✓Free — A Tragedy in Five Acts. Translated from the German of Ferdinand Lassalle, by Daniel De Leon | Ferdinand Lassalle | English |
| 1904 | The Burning Question of Trades Unionism✓ | Daniel De Leon | English |
| 1904 | The Gold Sickle or Hena the, Virgin of the Isle of Sen✓Free — A Tale of Druid Gaul | Eugène Sue | English |
| 1904 | The Infant's Skull✓Free — Or, the End of the World, a Tale of the Millennium | Eugène Sue | English, French |
| 1904 | The Infant's Skull or the End of the World✓ — A Tale of the Millenium | Eugène Sue | English |
| 1904 | The Pilgrim's Shell✓Free — Or, Fergan the Quarryman, a Tale from the Feudal Times, by Eugene Sue | Eugène Sue | English |
| 1904 | The Pilgrim's Shell; or, Fergan the Quarryman, a Tale from the Feudal Times✓Free | Eugène Sue | English |
| 1904 | Woman Under Socialism✓Free | August Bebel | English |
| 1904 | Woman Under Socialism. Translated from the Original German of the 33d Ed., by Daniel De LeonFree | August Bebel | English |
| 1904 | Women Under Socialism✓ The Gerritsen Collection - Women`s History Online | August Bebel | English |
| 1905 | Flashlights of the Amsterdam International Socialist Congress, 1904✓Free | Daniel De Leon | English |
| 1905 | Industrial Unionism✓Free — An Address Delivered at Grand Central Palace, New York, Sunday, December 10, 1905 Harvard Social History/business Preservation Microfilm Project -- 24782 | Eugene V. Debs | English |
| 1905 | John Mitchell Exposed✓Free — Robert Randell's Charges Against the Mine Workers' President at the 1905 Indianapolis Convention, with His Reply to Mitchell's Answer | Robert Randell | English |
| 1905 | Proceedings of the First Convention of the Industrial Workers of the World✓Free | Industrial Workers | English |
| 1905 | Proceedings of the First Convention of the Industrial Workers of the World, Founded at Chicago, June 27 - July 8, 1905 | Industrial Workers | English |
| 1905 | The Preamble of the Industrial Workers of the World✓Free | Daniel De Leon | English |
| 1905 | Trades Unionism in the United States, 1742-1905✓Free — Bulwark of Capitalism or Framework of Socialism? An Historical Glimpse | Justus Ebert | English |
| 1906 | Governor Altgeld's Pardon of Neebe, Fielden and Schwab. Vindication of the Chicago Martyrs of 1887✓Free — Parsons, Spies, Fisher, Engel, and Lingg | — | English |
| 1906 | The Iron Trevet, or, Jocelyn, the Champion✓Free — A Tale of the Jacuerie | Eugène Sue | English |
| 1907 | American Industrial Evolution, from the Frontier to the Factory✓Free | Justus Ebert | English |
| 1907 | American Industrial Revolution✓ — From the Frontier to the Factory: Its Social and Political Effects | Justus Ebert | English |
| 1907 | Antipatriotism✓Free — Address of Gustave Hervé at the Close of His Trial for Anti-militarist Activity, Before the Jury of La Seine, December, 1905 | Gustave Hervé | English |
| 1907 | The Brass Bell✓Free — Or, the Chariot of Death, a Tale of Caesar's Gallic Invasion | Eugène Sue | English |
| 1907 | The Brass Bell: A Tale of Caesar's Gallic InvasionFree | Eugène Sue | English |
| 1907 | The Poniard's Hilt✓Free — Or, Karadeucq and Ronan; a Tale of Bagauders and Vagres | Eugène Sue | English |
| 1908 | Constitution of the Socialist Labor Party of the United States of America✓ | Socialist labor party | English |
| 1908 | Manifesto of the Communist Party✓Free — By Karl Marx and Frederick Engels. Engl. Transl. Ed. and Annot. By Frederick Engels | Karl Marx | English |
| 1908 | Manifesto of the Communist Party, by Karl Marx and Friedrich Engels. Authorized English Translation, Edited and Annotated by Friedrich Engels✓Free | Karl Marx | English |
| 1908 | Marx on Mallock, or, Facts vs. Fiction✓ Library of American Civilization -- LAC 40006 | Daniel De Leon | English |
| 1908 | The Abbatial Crosier✓Free — Or, Bonaik and Septimine, a Tale of a Medieval Abbess | Eugène Sue | English, French |
| 1908 | The Branding Needle✓Free — Or, the Monastery of Charolles, a Tale of the First Communal Charter | Eugène Sue | English |
| 1908 | The Carlovingian Coins✓Free — Or, the Daughters of Charlemagne; a Tale of the Ninth Century | Eugène Sue & Daniel De Leon | English, French |
| 1908 | The Carlovingian Coins, or, the Daughters of Charlemagne✓Free — A Tale Grand Monarch | Eugène Sue | English |
| 1908 | The Mysteries of the Peoples✓ — Transl. From the Original French | Eugène Sue & Daniel De Leon | Not recorded |
| 1908 | Woman and Her Emancipation✓ | John H. Halls | English |
| 1908 | Woman and the Socialist Movement✓Free Nineteenth Century Collections Online (NCCO): Women: Transnational Networks | Olive M. Johnson | English |
| 1909 | Address Issued by the National Executive Committee of the Socialist Labor Party, in Semi-annual Session Convened New York, Jan. 4th, 1909✓Free | Socialist Labor Party | English |
| 1909 | Silver Cross or the Carpenter of Nazaret✓ | Sue, Eugene. Trans. by Daniel de León | English |
| 1909 | The Casque's Lark: Or, Victoria, the Mother of the Camps, a Tale of the ...Free | Daniel De Leon Eugène Sue | English |
| 1909 | The Casque's Lark. Or, Victoria, the Mother of the Camps✓Free — A Tale of the Frankish Invasion of Gaul The Mysteries of the People: History of a Proletarian Family Across the Ages | Eugène Sue | English |
| 1909 | The Iron Arrow Head or the Buckler Maiden✓Free — A Tale of the Northman Invasion | Eugène Sue | English |
| 1909-01-01 | The Iron Collar or Faustina and Syomara✓Free — A Tale of Slavery Under the Romans | Eugène Sue | English |
| 1909 | The Iron Pincers✓Free — Or, Mylio and Karvel, a Tale of the Albigensian Crusades | Eugène Sue | English |
| 1909 | The Iron Pincers or Mylio and Karrel✓ — A Tale of the Albigensian Crusades | Eugène Sue | English |
| 1909 | The Iron Pincers, or, Mylio and Karuel✓ — A Tale of the Albigensian Crusades | Eugène Sue | English |
| 1909 | The Silver Cross✓Free — Or, the Carpenter of Nazareth; a Tale of Jerusalem | Eugène Sue | English |
| 1909 | Woman and the Socialist Movement, by Olive M. Johnson. Written for the Socialist Women of Greater New York✓Free | Olive M. Johnson | English |
| 1909 | Woman's Suffrage✓Free — An Address | Daniel De Leon | English |
| 1910 | Executioner's Knife or Joan of Arc✓ | Sue, Eugene. Trans by Daniel de León | English |
| 1910 | Franz von Sickingen✓Free — A Tragedy in Five Acts | Ferdinand Lassalle | English |
| 1910 | The Balcksmith's Hammer, or, the Peasant Code✓ — A Tale of the Grand Monarch | Eugène Sue | English |
| 1910 | The Blacksmith's Hammer✓Free — Or, the Peasant Code | Eugène Sue | English |
| 1910 | The Executioner's Knife✓Free — Or, Joan of Arc; a Tale of the Inquisition | Eugène Sue | English |
| 1910 | The Galley Slave's Ring, or, the Family of Lebrenn✓Free — A Tale of the French Revolution of 1848 | Eugène Sue | English |
| 1910 | The Pocket Bible✓Free | Eugene Sue | English |
| 1910 | The Pocket Bible, or, Christian the Printer✓Free — A Tale of the Sixteenth Century | Eugène Sue | English |
| 1910 | The Sword of Honor✓ — Or, the Foundation of the French Republic; a Tale of the French Revolution | Eugène Sue | English |
| 1910 | The Sword of Honour, or, the Foundation of the French Republic✓ — A Tale of the French Revolution | Eugène Sue | English |
| 1911 | Abolition of Poverty✓ — Socialist Versus Ultramontane Economics and Politics Library of American Civilization -- LAC 40006 | Daniel De Leon | English |
| 1911 | Abolition of Poverty Socialist Versus Ultramontane Economics and Polit✓ | Daniel De Leon | English |
| 1911 | Berger's Hit and Misses at the Called Session of the Sixty-Second CongressFree | Daniel De Leon | English |
| 1911 | Berger's Hit and Misses at the Called Session of the Sixty-Second Congress, April-October 1911✓ — A Symposium of Economic, Political, Sociological, Tactical and Historic Live Topics | Daniel De Leon | English |
| 1911 | Berger's Hits and Misses at the Called Session of the Sixty-Second Congress, April-October✓Free — A Symposium of Economic, Political, Sociological, Tactical and Historic Live Topics [With His De Leon-Berry Debate. New York, 1915] | Daniel De Leon & Socialist Labor Party | English |
| 1911 | The "Trial" of Ferrer✓Free — A Clerical Judicial Murder | Jaime de Angulo | English |
| 1911 | The Galley Slave's Ring✓Free — Or, the Family of Lebrenn | Eugène Sue | English |
| 1911 | The Mysteries of the People✓Free — Or, History of a Proletarian Family Across the Ages | Eugène Sue | English |
| 1911 | The Socialist Republic✓Free | Karl Kautsky | English |
| 1911 | The Socialist Republic, by Karl Kautsky, Tr. from the German and Adapted to America, by Daniel De Leon✓Free | Karl Kautsky | English |
| 1911 | The Working Class (the Proletariat)✓Free | Karl Kautsky | English |
| 1911 | Watson on the Gridiron or Bourgeois Theories Disected and Hang-up to Dry✓ — A Political-Economic Discussion Between Thomas E. Watson and Daniel De Leon | Daniel De Leon & Thomas Edwards Watson | English |
| 1911 | Watson on the Gridiron, or, Bourgeois Theories Dissected and Hung up to Dry✓Free — A Political-Economic Discussion Between Thomas E. Watson and Daniel De Leon | Daniel De Leon | English |
| 1911 | Woman's Suffrage✓ — An Address Nineteenth Century Collections Online: Women and Transnational Networks | Daniel De Leon | English |
| 1912 | De Leon-Carmody Debate✓Free — Individualism vs. Socialism | Daniel De Leon | English |
| 1913 | What Means This Strike?✓Free | Daniel De Leon | English |
| 1914 | Father Gassoniana✓ | Daniel de León | English |
| 1914 | Father Gassoniana, or, Jesuit "Sociology" and "Economics" at the Bar of Science and History✓Free — The Effort of Religio-Politics and Economics to Shield Terrestrial Capitalism Shivered | Daniel De Leon | English |
| 1914 | Unity✓ — An Address Delivered by Daniel De Leon at New Pythagoras Hall New York, February 21, 1908 | Daniel De Leon | English |
| 1914 | Woman's Suffrage✓ — An Address Delivered | Daniel De Leon | English |
| 1916 | Brass Bell✓Free — Or, the Chariot of Death, a Tale of Caesar's Gallie Invasion | Eugène Sue | English |
| 1916 | Crises in European History✓ | Gustav Bang | English |
| 1916 | The Brass Bell, or, the Chariot of Death✓Free — A Tale of Caesar's Gallic Invasion The Mysteries of the People; or, History of a Proletarian Family Across the Ages | Eugène Sue | English |
| 1916 | The Religion of Capital✓Free — A Satirical Exposure of Capital's Claims to Sanctity | Paul Lafargue | English |
| 1917 | Berger's Hit and Misses at the Called Session of the Sixty-Second Congress, April-October✓ — A Symposium of Economic, Political, Sociological, Tactical, and Historic Live Topics | Daniel De Leon | English |
| 1917 | Woman Under Socialism✓Free | August Bebel | English |
| 1918 | Industrial Unionism✓Free | Daniel De Leon | English |
| 1918 | Industrial Unionism by Daniel De Leon✓Free — Also, an Address on the Same Subject Delivered at Grand Central Palace, New York, Sunday, Dec. 10, 1905, by Eugene v. Debs | Daniel De Leon | English |
| 1919 | Flashlights of the Amsterdam International Socialist Congress, 1904✓Free | Daniel De Leon | English |
| 1919 | Historical Materialism✓Free | Friedrich Engels, Edward B. Aveling & L. Sanial | English, German |
| 1919 | Industrial Unionism✓Free | Daniel De Leon | English |
| 1919 | The Religion of Capital✓ — A Satirical Exposure of Capital's Claims to Sanctity | Paul Lafargue | English |
| 1920 | Der sozialistische Industrie-Unionismus✓ — Eine Ansprache, gehalten im Grand Central Palace, New York, Sonntag, den 10. Dezember 1905 | Eugene V. Debs & Karl Dannenberg | German |
| 1920 | The Paris Commune✓Free — Including the 'First Manifesto of the International on the Franco-Prussian War', the 'Second Manifesto of the International on the Franco-Prussian War', 'the Civil War in France' Arm and Hammer Series | Karl Marx, Friedrich Engels & Lucien Sanial | English |
| 1920 | The Trial of Ferrer✓Free — A Clerical-Judicial Murder | Jaime de Angulo | English |
| 1921 | Free TradeFree — An Address Delivered Before the Democratic Association of Brussels, Belgium, January 9, 1848 | Karl Marx | English |
| 1921 | Free Trade✓Free — An address delivered before the Democratic Association of Brussels, Belgium, Jan. 9. 1848 | Karl Marx & Florence Kelley | German |
| 1921 | National Convention. Socialist Labor Party. Reports, Resolutions, Platform, EtcFree | Socialist Labor Party | English |
| 1921 | Wage-Labor and Capital✓Free | Karl Marx | English |
| 1922 | Factory Work as It Is and Might Be✓Free — A Series of Four Papers | William Morris | English |
| 1922 | La producción socialista y el Derrumbamiento del capitalismo✓ | Socialist Labor Party of America | Spanish |
| 1922 | Sosialistikē paragōgē kai katarreysis toy kapitalismoy✓ | Socialist Labor Party of America | Greek |
| 1922 | Sozialistische Production und der Zusammenbruch des Kapitalismus✓ — Manifest der Sozialistischen Arbeiter Partei von Amerika | Socialist Labor Party | German |
| 1922 | The Revolutionary Act✓Free — Military Insurrection or Political and Economic Action? By Frederick Engels, Tr. by Henry Kuhn, with an Appendix by Daniel de Leon | Friedrich Engels | English |
| 1922 | The Revolutionary Act; Military Insurrection or Political and Economic Action?✓Free | Friedrich Engels, Henry Kuhn & Daniel De Leon | English |
| 1922 | The Story of the French Revolution✓Free | Ernest Belfort Bax | English |
| 1923 | Daniel De Leon, American Socialist Pathfinder✓Free | Olive M. Johnson | English |
| 1923 | Ten Cannons of the Proletarian Revolution✓ — A Revolutionary Decalogue | Daniel De Leon | Not recorded |
| 1923 | Ten Canons of the Proletarian Revolution. A Revolutionary Decalogue✓ | Daniel De León | English |
| 1923 | The Mysteries of the People✓Free — Or, History of a Proletarian Family Across the Ages. Translated by Daniel De Leon | Eugène Sue | English |
| 1923 | The Mysteries of the People, or, History of a Proletarian Family Across the Ages | Eugène Sue | English |
| 1923 | Woman under socialism✓Free | August Bebel & Daniel de Leon | German |
| 1924 | The Class Struggles in France, 1848-1850✓Free | Karl Marx | English |
| 1924 | The Cooperative Movement✓Free — An Infantile Disorder and an Old-Age Disease | Olive M. Johnson | English |
| 1924 | The Sixteenth National Convention of the Socialist Labor PartyFree | Socialist Labor Party | English |
| 1925 | Marx on Mallock or facts vs. Fiction✓ — An Address delivered in Maennerchor Hall, New York, Jan. 21. 1908 | Daniel de Leon | German |
| 1925 | The Religion of capital✓ — A satirical exposure of capital's claims to sanctity | Paul Lafargue | German |
| 1926 | Who Are the Falsifiers?✓Free — Documentary Evidence Proving Correctness and Authenticity of the S.L.P. Translation of Frederick Engels' Introduction to "Class Struggles in France" by Karl Marx, and an Exposure of the "Communist" or Burlesque Bolsheviki Falsification and Garbling of That Same Introduction | Weekly people | English |
| 1927 | Evolution of Society from Primitive Savagery to the Industrial Republic✓Free | Worden Horst Mills | English |
| 1927 | The Evolution of Society✓ — From Primitive Savagery to the Industrial Republic | Word H. Mills | English |
| 1928 | Crises in European History✓Free | Gustav Bang | English |
| 1928 | Historical Materialism✓Free | Friedrich Engels | English |
| 1928 | The Mark✓ — Written as an app. to "Socialism, utopian and scientific" | Friedrich Engels | German |
| 1928 | The Mark✓Free | Friedrich Engels | English |
| 1928 | Ultramontanism✓Free — Roman Catholic Political Machine in Action | Daniel De Leon | English |
| 1929 | Flashlights of the Amsterdam Congress✓Free | Daniel De Leon | English |
| 1929-01-01 | Flashlights of Them Amsterdam Congress | Daniel De Leon | English |
| 1929 | Seventeenth National Convention. Socialist Labor PartyFree | Socialist Labor Party | English |
| 1929 | The Religion of Capital✓Free — A Satirical Exposure of Capital's Claims to Sanctity | Paul Lafargue | English |
| 1930 | Craft Unionism Versus Industrial Unionism✓ | Frank Budgen & L. Cotton | English |
| 1930 | Fifteen Questions Asked by the Providence, R. I., "Visitor"✓ — Representing the Roman Catholic Political Machine | Daniel De Leon | English |
| 1930 | Industrial Government✓Free — Industrial Feudal Autocracy Versus Industrial Democracy | Olive M. Johnson | English |
| 1930 | Russia in Revolution✓ — Selected Editorials | Daniel De Leon | English |
| 1930 | Socialist Reconstruction of Society (the Preamble of the I[ndustrial] W[orkers] W[orld])✓ — The Industrial Vote | Daniel de Leon | Not recorded |
| 1930 | The Religion of Capital✓ — A Satirical Exposure of Capital's Claims to Sanctity | Paul Lafargue | English |
| 1931 | Daniel De Leon, Pioneer Socialist Editor✓ | Arnold Petersen | English |
| 1931 | Industrial Unionism✓Free — Selected Editorials | Daniel De Leon | English |
| 1931 | Marxism vs. Anti-Marxism✓ | Arnold Petersen | English |
| 1931 | Party Ownership of the Press✓ — Historic Documents Relating to the Establishing of the Principles Involved | Daniel De Leon | English |
| 1931 | Revolutioanry Milestones✓Free | Arnold Petersen | English |
| 1931 | Revolutionary Milestones✓ | Arnold Petersen | English |
| 1931 | Revolutionary Milestones, 1890-1930✓ | Arnold Petersen | English |
| 1931 | Revolutionary Socialism in U. S. Congress✓ — "Parliamentary Idiocy" vs. Marxian Socialism | Daniel De Leon | English |
| 1931 | The Socialist Labor Party During Four Decades, 1890-1930✓Free | Henry Kuhn | English |
| 1931 | The Socialist Labor Party During Four Decades, 1890-1930, by Henry Kuhn and Olive M. Johnson✓Free | Henry Kuhn | English |
| 1932 | Daniel De Leon✓ — The Struggle Against Opportunism in the American Labor Movement | Leonid Raĭskiĭ | English |
| 1932 | Marxian Science and the Colleges✓ | Daniel De Leon | English |
| 1932 | The Burning Question of Trades Unionism✓ — A Lecture Delivered at Newark, N.J., April 21, 1904 | Daniel De Leon | English |
| 1932 | The Virus of Anarchy✓ — Bakuninism vs. Marxism | Arnold Petersen | English |
| 1933 | De Leon-Berry Debate on Solution for the Trust Problem✓ — Between Daniel De Leon and Wm. H. Berry, Held Before the University Extension Society, Philadelphia, January 27, 1913 | Daniel De Leon | English |
| 1933 | Karl Marx and Marxism✓ — A Universal Genius, His Discoveries, His Traducers | Arnold Petersen | English |
| 1933 | Proletarian Democracy vs. Dictatorships and Despotism✓ | Arnold Petersen & Socialist Labor Party | English |
| 1933 | Reform or Revolution✓Free | Daniel De Leon | English |