Tác giả: Samantha Wisely

John L. Koprowski is a professor of wildlife conservation and management and the director of the School of Natural Resources and the Environment at the University of Arizona. He is a coauthor of Squirrels of the World. Paul R. Krausman is emeritus professor of wildlife conservation and management at the University of Arizona. The editor-in-chief of the Journal of Wildlife Management, he is the author of And Then There Were None: The Demise of Desert Bighorn Sheep in the Pusch Ridge Wilderness.