Vanguard Press · 1926
The Riddle of the Universe
verified
- Author
- Ernst Heinrich Philipp August Haeckel
- Imprint
- New York: Vanguard Press, 1926
- Language
- English
- Pages
- 106
- Copyright
- Public domain in the United States (published 95 or more years ago).
- Sources
- Open Library edition OL20997355M
Cite this
Chicago
Haeckel, Ernst Heinrich Philipp August. The Riddle of the Universe. New York: Vanguard Press, 1926.
MLA
Haeckel, Ernst Heinrich Philipp August. The Riddle of the Universe. Vanguard Press, 1926.
APA
Haeckel, E. H. P. A. (1926). The Riddle of the Universe. Vanguard Press.