Milling methods and costs at the Montana mine concentrator of the Eagle-Picher Lead Co., Ruby, Ariz. / D.E. Andrus.
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Format: | Government Document Book |
Language: | English |
Published: |
[Washington] :
Dept. of Commerce, U.S. Bureau of Mines,
1931.
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Series: | Information circular (United States. Bureau of Mines) ;
6497. |
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