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1.
Electric activity in ore deposits / by Roger C. Wells. by Series: United States. Bulletin ; 548.
Material type: Text Text; Format: print ; Literary form: Not fiction
Publication details: Washington, Govt. Print. Off., 1914
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2.
The Fractional precipitation of some ore-forming compounds at moderate temperatures / by Roger C. Wells. by Series: United States. Bulletin ; 609.
Material type: Text Text; Format: print ; Literary form: Not fiction
Publication details: Washington, Govt. Print. Off., 1915
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3.
Analyses of rocks and minerals from the laboratory of the United States Geological Survey, 1914-36, tabulated by Roger C. Wells, chief chemist. by Series: United States. Gelogical survey. Bulletin 878
Material type: Text Text; Format: print ; Literary form: Not fiction
Publication details: Washington, U.S. Govt. Print. Off., 1937
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