زیستشناسیEvolution and Classification of the Pocket Gophers of the Subfamily GeomyinaeRobert J. Russell
مهندسیThe Preparation of Illustrations for Reports of the United States Geological SurveyJohn L. Ridgway
تکاملThe Geological History of Fossil Butte National Monument and Fossil BasinPaul O. McGrew & Michael Casilliano
