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Analyses of rocks and minerals from the laboratory of the United States Geological Survey, 1914-36

Wells, Roger Clark, 1877-1944, author.
[Washington, D.C.] : United States Department of the Interior, Geological Survey, 1937. 1937

Chemistry of deposition of native copper from ascending solutions

Wells, Roger Clark, 1877-1944 author.
[Washington, D.C.] : Department of the Interior, U.S. Geological Survey, 1925. 1925

Contributions to geochemistry, 1942-45 : short papers

Wells, Roger Clark, 1877-1944 author.
[Washington, D.C.] : United States Department of the Interior, Geological Survey, 1946. 1946

Electric activity in ore deposits

Wells, Roger Clark, 1877-1944, author.
[Washington, D.C.] : Department of the Interior, United States Geological Survey, 1914. 1914

The evaporation and concentration of waters associated with petroleum and natural gas

Mills, R. Van A. (Ronald Van Auken), 1881- author.
[Washington, D.C.] : Department of the Interior, United States Geological Survey, 1919. 1919

Experiments on the extraction of potash from wyomingite

Wells, Roger Clark, 1877-1944, author.
[Washington, D.C.] : [Department of the Interior, United States Geological Survey], [1917] 1916

The fractional precipitation of some ore-forming compounds at moderate temperatures

Wells, Roger Clark, 1877-1944, author.
[Washington, D.C.] : Department of the Interior, United States Geological Survey, 1915. 1915

New determinations of carbon dioxide in the water of the Gulf of Mexico

Wells, Roger Clark, 1877-1944 author.
Washington : Department of the Interior, United States Geological Survey, 1918. 1918

Relative abundance of nickel in the earth's crust

Wells, Roger Clark, 1877-1944, author.
Washington : United States Department of the Interior, Geological Survey, 1943. 1943

Salinity of the water of Chesapeake Bay

Wells, Roger Clark, 1877-1944, author.
Washington : Department of the Interior, U.S. Geological Survey, 1929. 1928

Sodium sulphate, its sources and uses

Wells, Roger Clark, 1877-1944, author.
[Washington, D.C.] : Department of the Interior, United States Geological Survey, 1923. 1923