A new fauna from the Fort Union of Montana - Simpson, George Gaylord 1902-1984 (The American Museum of Natural History, 1936)
Caption title. - "July 13, 1936."
Specimens collected in 1935 by H.S. Scarritt, Walter Granger, A.C. Silberling, Albert Thomson and the author during the Third Scarritt Expedition
Includes bibliographical references (page 27)