Permissible coal-cutting equipment approved prior to July 1, 1932 / by L.C. Ilsley, H.B. Brunot, and H.B. Freeman.
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Other Authors: | , |
Format: | Government Document Book |
Language: | English |
Published: |
Washington :
U.S. G.P.O.,
1934.
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Series: | Bulletin (United States. Bureau of Mines) ;
382. U.S. Department of the Interior, Bureau of Mines, Bulletin 382. |
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