Early Permian vertebrates from the Cutler Formation of the Placerville area, Colorado,

by Lewis, G. Edward (George Edward)
Washington, U.S. Govt. Print. Off., 1965

Early Permian vertebrates from the Cutler Formation of the Placerville area, Colorado /

by Lewis, G. Edward (George Edward), Vaughn, Peter Paul, 1928-
Washington : United States Government Printing Office, 1965

Early Permian vertebrates from the Cutler Formation of the Placerville area, Colorado /

by Lewis, G. Edward (George Edward), Baird, Donald, Vaughn, Peter Paul, 1928-
Washington : United States Department of the Interior, Geological Survey, 1965

A new species of Merychippus /

by Buwalda, John P. (John Peter), 1886-1954, Lewis, G. Edward (George Edward)
Washington : United States Department of the Interior, Geological Survey, 1955

An annotated bibliography of the chain pickerel, Esox niger (Osteichthyes: Salmoniformes)

by Crossman, E. J. (Edwin John), 1929-2003, Lewis, G. Edward (George Edward)
[Toronto] [Royal Ontario Museum], 1973

A new species of Merychippus /

by Buwalda, John P. (John Peter), 1886-1954, Lewis, G. Edward (George Edward)
Washington : U.S. Govt. Print. Off, 1955

A new species of Merychippus,

by Buwalda, John P. (John Peter), 1886-1954, Lewis, G. Edward (George Edward)
Washington, U.S. Govt. Print. Off., 1955

Black Beaver, the trapper the only book ever written by a trapper. Twenty-two years with Black Beaver. Lewis and Clark a hundred years later. From the Amazon to the Mackenzie River...

by Lewis, James Campbell, 1879-
[Chicago] [Printed by Robert O. Law Co.], 1911

Contributions to paleontology.

Washington, D.C. : U.S. G.P.O., 1965