Howell, Arthur H. 1872-1940. Revision of the American marmots, by Arthur H. Howell. - Washington, Govt. print. off., 1915. - 80 p. incl. 3 maps. XV pl. (incl. front.) on 8 l. 23 cm. - U.S. Dept. of agriculture. Bureau of biological survey. North American fauna. no. 37 . LCCN: agr15000389 Subjects--Topical Terms: Marmots. LC Class. No.: QL155 / .A4 no. 37