Methods and costs of mining ferberite ore at the Cold Springs Mine, Nederland, Boulder County, Colo. / by William O. Vanderburg.
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Other title: | Ferberite ore. |
Format: | Government Document Book |
Language: | English |
Published: |
Washington, D.C. :
U.S. Dept. of Commerce, Bureau of Mines,
1932.
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Series: | Information circular (United States. Bureau of Mines) ;
6673. |
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