Szalay, Frederick S. 1938- Beginning of the age of mammals in Asia, the late paleocene gashato fauna, Mongolia / Frederick S. Szalay, Malcolm C. Mckenna. -- New York : [s.n.], 1971 - p. 271-317. -- (Bulletin of the American Museum of Natural History ; 144, 4). Subjects--Topical Terms: Mamíferos Universal Decimal Class. No.: 599