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Showing 21 - 40 results of 64 for search '"United States Bureau of Mines"', query time: 0.28s Refine Results
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    by Petersen, Max S.
    Published 1944
    ... Wood Mining History Archive, Arthur Lakes Library, Colorado School of Mines. Donor: United States...
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  14. 34
    by Petersen, Max S.
    Published 1944
    ... Wood Mining History Archive, Arthur Lakes Library, Colorado School of Mines. Donor: United States...
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  15. 35
    by Petersen, Max S.
    Published 1944
    ... Mining History Archive, Arthur Lakes Library, Colorado School of Mines. Donor: United States Bureau...
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  16. 36
    by Petersen, Max S.
    Published 1944
    ... Mining History Archive, Arthur Lakes Library, Colorado School of Mines. Donor: United States Bureau...
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  17. 37
    by Petersen, Max S.
    Published 1944
    ... of Mines. Donor: United States Bureau of Mines. A man operates a mine rescue telephone at the fresh-air...
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  18. 38
    by Petersen, Max S.
    Published 1944
    ... of Mines. Donor: United States Bureau of Mines. A man operates a mine rescue telephone at the fresh-air...
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  19. 39
    by Petersen, Max S.
    Published 1944
    ..., Arthur Lakes Library, Colorado School of Mines. Donor: United States Bureau of Mines. A churn drill...
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  20. 40
    by Petersen, Max S.
    Published 1944
    ...: United States Bureau of Mines. A churn-drill tool used to sink a ventilation hole lies in the snow...
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