| title | creator | language | description | tableOfContents | contributor | subject | created |
| Geographic Variation in the Harvest Mouse, Reithrodontomys megalotis, On the Central Great Plains And in Adjacent Regions | | en | | | | Reithrodontomys; Animals -- Variation | 2009-08-01 |
| 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 |
| Geographic Variation in the Pocket Gopher, Cratogeomys castanops, in Coahuila Mexico | | en | | | | | 2010-05-31 |
| Geographic Variation in Red-backed Mice (Genus Clethrionomys) of the Southern Rocky Mountain Region | | en | | | | | 2010-06-04 |
| Are the Effects of Use and Disuse Inherited?
An Examination of the View Held by Spencer and Darwin | Ball, W. P. (William Platt) | en | | | | Heredity; Variation (Biology) | 2008-08-26 |
| Evolution in Modern Thought | | en | | Darwin's predecessors, by J.A. Thomson -- The selection theory, by A. Weismann -- Heredity and variation in modern lights, by W. Bateson -- "The descent of man," by G. Schwalbe -- Charles Darwin as an anthropologist, by E. Haeckel -- Mental factors in evolution, by C.L. Morgan -- The influence of the conception of evolution on modern philosophy, by H. Höffding -- The influence of Darwin upon religious thought, by P.H. Waggett -- Darwinism and history, by J.B. Bury -- Darwinism and sociology, by C. Bouglé. | | | 2007-08-29 |