Silver yield from copper ores and the effects of 64.64-cent silver on the value of copper ores produced in the United States / by Elmer W. Pehrson.
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| Format: | Government Document Book |
| Language: | English |
| Published: |
Washington, D.C. :
U.S. Dept. of the Interior, Bureau of Mines,
1934.
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| Series: | Information circular (United States. Bureau of Mines) ;
6773. |
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