Mineral issues
U.S. Dept. of the Interior, Bureau of Mines , For sale by Supt. of Docs., U.S. G.P.O
Mineral issues : an analytical series
by Louis J. Sousa
U.S. Dept. of the Interior, Bureau of Mines , For sale by Supt. of Docs., U.S. G.P.O. [1981] Mineral issues
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