Otter Creek coral bed and its fauna, east-central Kentucky /

by Simmons, George Clarke, 1923-
Washington : U.S. Govt. Print. Off., 1967

Geology and mineral resources of the Bar~ao de Cocais area, Minas Gerais, Brazil,

by Simmons, George Clarke, 1923-
Washington, U.S. Govt. Print. Off., 1968

Mineral resources of the Cougar Lakes-Mount Aix study area, Yakima and Lewis Counties, Washington /

by Simmons, George Clarke, 1923-
Washington : G.P.O., 1983

Geologic map of the Union City quadrangle, Madison and Clark Counties, Kentucky

by Simmons, George Clarke, 1923-
Washington, D.C. : U.S. Geological Survey, 1967

Bedrock geologic map of the Ishpeming quadrangle, Marquette County, Michigan

by Simmons, George Clarke, 1923-
Reston, Va. : U.S. Geological Survey, 1974

Geology and iron deposits of the western Serra do Curral, Minas Gerais, Brazil,

by Simmons, George Clarke, 1923-
Washington, U.S. Govt. Print. Off., 1968

Geology and mineral resources of the Barão de Cocais area, Minas Gerais, Brazil /

by Simmons, George Clarke, 1923-
Washington : U.S. Govt. Print. Off., 1968

Bedrock geologic map of the Ishpeming quadrangle, Marquette County, Michigan /

by Simmons, George Clarke, 1923-
Reston, Va. : The Survey, 1974

Geologic map of the Clay City quadrangle, Powell and Estill Counties, Kentucky /

by Simmons, George Clarke, 1923-
Washington, D.C. : U.S. Geological Survey, 1967

Otter Creek coral bed and its fauna, east-central Kentucky /

by Simmons, George Clarke, 1923-
Washington : U.S. Govt. Print. Off., 1967

Geology and iron deposits of the western Serra do Curral, Minas Gerais, Brazil /

by Simmons, George Clarke, 1923-
Washington : United States Department of the Interior, Geological Survey, 1968

Geologic map of the Palmer quadrangle, east-central Kentucky /

by Simmons, George Clarke, 1923-
Washington, D.C. : U.S. Geological Survey, 1967

Geologic map of the Union City quadrangle, Madison and Clark Counties, Kentucky /

by Simmons, George Clarke, 1923-
Washington, D.C. : U.S. Geological Survey, 1967

Geology and mineral resources of the Barão de Cocais area, Minas Gerais, Brazil /

by Simmons, George Clarke, 1923-
Washington : United States Department of the Interior, Geological Survey, 1968

Mineral resources of the Cougar Lakes-Mount Aix study area, Yakima and Lewis Counties, Washington /

by Simmons, George Clarke, 1923-
[Reston Va.?] : Washington, D.C. : U.S. Dept. of the Interior, Geological Survey ; For sale by the Supt. of Docs., 1984

Geologic map of the Palmer quadrangle, east-central Kentucky

by Simmons, George Clarke, 1923-
Washington, D.C. : U.S. Geological Survey, 1967

Geologic map of the Clay City quadrangle, Powell and Estill Counties, Kentucky

by Simmons, George Clarke, 1923-
Washington, D.C. : U.S. Geological Survey, 1967

Marble Gorge and Grand Canyon,

by Simmons, George Clarke, 1923-, Gaskill, David L.
Flagstaff, Ariz., Northland Press 1969

Otter Creek coral bed and its fauna, east-central Kentucky /

by Simmons, George Clarke, 1923-, Oliver, William Albert, 1926-2005
[Washington, D.C.] : United States Department of the Interior, Geological Survey, 1967

Mineral resources of the Cougar Lakes-Mount Aix study area, Yakima and Lewis Counties, Washington /

by Simmons, George Clarke, 1923-, Van Noy, Ronald M., Zilka, Nicholas T.
[Reston, Va.] : United States Department of the Interior, Geological Survey, 1983