Mining methods and costs at Interstate Zinc & Lead Co.'s Hartley mine, Tri-State zinc and lead district.
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| Online Access: |
Full Text (via ProQuest) |
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| Format: | Government Document eBook |
| Language: | English |
| Published: |
Washington, D.C. :
[s.n.],
1932.
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| Series: | Mines Bur. Info. Circ. No. 6656.
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| Subjects: |
| Item Description: | Record is based on bibliographic data in ProQuest U.S. Executive Branch Documents, 1910-1932. Reuse except for individual research requires license from ProQuest, LLC. [With data] |
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| Physical Description: | 1 online resource (16 p.), digital, PDF file. |