Why, when, and how to make ventilation surveys of metal mines / by G.E. McElroy.
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| Format: | Government Document Book |
| Language: | English |
| Published: |
Washington, D.C. :
U.S. Dept. of Commerce, Bureau of Mines,
1928.
|
| Series: | Information circular (United States. Bureau of Mines) ;
6086. |
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Why, when, and how to make ventilation surveys of metal mines
Published 1928
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Why, when, and how to make ventilation surveys of metal mines.
Published 1928
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