Simpson, George Gaylord, 1902-Scarritt Patagonian Expedition 1930-1931)2005-10-062005-10-061933http://hdl.handle.net/2246/204328 p. : ill. ; 24 cm.Includes bibliographical references (p. 28).2895031 bytesapplication/pdfen-USQL1 .A436 no.608, 1933Trigonostylops.Skull.Mammals, Fossil -- Argentina.Mammals, Fossil -- Patagonia (Argentina and Chile)Paleontology -- Eocene -- Argentina.Paleontology -- Eocene -- Patagonia (Argentina and Chile)Paleontology -- Argentina.Paleontology -- Patagonia (Argentina and Chile)Structure and affinities of Trigonostylops. American Museum novitates ; no.608Structure and affinities, Trigonostylopstext