Title: Illustrated Key to Skulls of Genera of North American Land Mammals / Edition 1, Author: J. Knox Jones Jr.
Title: Mammals of North America: Second Edition / Edition 2, Author: Roland W. Kays
Title: Morphological Change in Quaternary Mammals of North America, Author: Robert A. Martin
Title: Wild Mammals of North America: Biology, Management, and Conservation / Edition 2, Author: George A. Feldhamer