Permissible electric mine lamps / by L.C. Ilsley and A.B. Hooker.
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| Main Author: | |
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| Corporate Author: | |
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| Format: | Government Document Book |
| Language: | English |
| Published: |
Washington :
U.S. G.P.O.,
1930.
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| Series: | Bulletin (United States. Bureau of Mines) ;
332. |
| Subjects: |