Botany & Horticulture in 1940

The Mammalian Fauna of the White River Oligocene: Part III. Lagomorpha: Transactions, American Philosophical Society (Vol. 28, Part 3) by Jepsen, Glenn Lowell, Scott, William Berryman, Wood, Albert Elmer

John and William Bartram: Botanists and Explorers, 1699-1777, 1739-1823 by Earnest, Ernest

Grundriß Der Allgemeinen Botanik by Wetzel, Karl

Desert Wild Flowers (Revised) by Jaeger, Edmund C.