Small-scale placer-mining methods / by Chas. F. Jackson and John B. Knaebel.
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Corporate Authors: | , |
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Format: | Government Document Book |
Language: | English |
Published: |
Washington, DC :
Dept. of Commerce : United States Bureau of Mines,
1932.
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Series: | Information circular (United States. Bureau of Mines) ;
6611. |
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