| Author's List |
| title | creator | language | description | tableOfContents | contributor | subject | created |
| The Variation of Animals and Plants Under Domestication, Vol. I. | Darwin, Charles, 1809-1882 | en | Plants, Cultivated; Variation (Biology); Domestic animals | 2008-03-27 | |||
| The Variation of Animals and Plants Under Domestication, Volume II (of 2) | Darwin, Charles, 1809-1882 | en | Domestic animals; Plants, Cultivated; Variation (Biology) | 2009-05-20 |