| Title: | On the Origin of Species by Means of Natural Selection, or the Preservation of Favoured Races in the Struggle for Life |
| Author: | Darwin, Charles, 1809-1882 |
| Note: | fifth thousand (second edition): London: J. Murray, 1860 |
| Link: | Gutenberg text, illustrated HTML, and page images |
| Stable link here: | http://onlinebooks.library.upenn.edu/webbin/book/lookupid?key=olbp48413 |
| Subject: | Evolution (Biology) |
| Subject: | Natural selection |
| Call number: | QH365 .O2 1860 |