- Series: Information circular / United States Department of the Interior, Bureau of Mines
- Unknown Binding: 13 pages
- Publisher: U.S. Dept. of the Interior, Bureau of Mines (1930)
- Language: English
- ASIN: B0008CC09O
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Mining methods and costs at the Ground Hog Unit, Asarco Mining Co., Vanadium, N. Mex (Information circular / United States Department of the Interior, Bureau of Mines) Unknown Binding – 1930
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