Undercut block-caving method of mining in western copper mines / by E.D. Gardner.
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| Format: | Government Document Book |
| Language: | English |
| Published: |
Washington, D.C. :
U.S. Dept. of Commerce, Bureau of Mines,
1930.
|
| Series: | Information circular (United States. Bureau of Mines) ;
6350. |
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Undercut block-caving method of mining in western copper mines
Published 1930
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Undercut block-caving method of mining in western copper mines.
Published 1930
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