| Author's List |
| title | creator | language | description | tableOfContents | contributor | subject | created |
| Systematic Status of a South American Frog, Allophryne ruthveni Gaige | en | 2010-02-16 | |||||
| Elements of Structural and Systematic Botany For High Schools and Elementary College Courses | Campbell, Douglas Houghton, 1859-1953 | en | 2007-01-17 |