By Young, William C. (William Caldwell), 1899-1965 / Allen, Edgar, 1892-1943 . Genre Sex (Biology) / Endocrinology / Sex / Physiology / Sex Hormones . Names animals / type / drosophila / adult / guinea and 11474 more

By Burnett, Charles Mountford, 1807-1866 . Genre Religion and science / 1800-1859 / Natural history / Natural theology . Names animals / animal / life / called / order and 2511 more

Genre Fruit-culture / British Columbia . Names fruit / soil / leaves / life / roots and 168 more

Genre n-us-pa / Philadelphia (Pa.) / Learned institutions and societies / Science / Periodicals . Names la / par / life / horse / order and 6483 more

Genre Zoology . Names california / plankton / unidentified / sp / teredo and 6878 more

Genre Biology . Names american / animals / america / fish / plants and 9795 more

Genre Gardening / Periodicals / Gardening / Germany / Periodicals and 5 more . Names ba / ge / na / alle / age and 9413 more