Manual of instructions for compiling reports of operating data for bituminous coal mines, for mines with average daily productive capacity in excess of 50 tons.
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| Format: | Government Document eBook |
| Language: | English |
| Published: |
[Washington] :
[s.n.],
1944.
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| Subjects: | |
| Online Access: | Electronic resource (PDF) |
| Physical Description: | 1 online resource (19 pages), digital, PDF file |
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