Placer mining in the western United States : part III. Dredging and other forms of mechanical handling of gravel, and drift mining / by E.D. Gardner and C.H. Johnson.
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| Format: | Government Document Book |
| Language: | English |
| Published: |
[Washington] :
U.S. Bureau of Mines,
1935.
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| Series: | Information circular (United States. Bureau of Mines) ;
6788. |
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