Permissible mine equipment approved during the calendar years 1953-54 / by R.A. Kearns and H.B. Brunot.
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| Format: | Government Document Book |
| Language: | English |
| Published: |
[Washington, D.C.] :
United States Bureau of Mines,
1955.
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| Series: | Information circular (United States. Bureau of Mines) ;
7722. |
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