Title: The Safari Companion: A Guide to Watching African Mammals Including Hoofed Mammals, Carnivores, and Primates / Edition 2, Author: Richard D. Estes
Title: The North American Grasshoppers, Volume II: Acrididae: Oedipodinae, Author: Daniel Otte
Title: The Behavior Guide to African Mammals: Including Hoofed Mammals, Carnivores, Primates, 20th Anniversary Edition, Author: Richard D. Estes