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  1. 1
    Safety organizations in Arizona copper mines.

    Safety organizations in Arizona copper mines. by Gardner, E. D. (Eugene Delos), 1885-, Parker, Dorsey J.

    Published 1929
    Subjects: “…Copper mines and mining Arizona. http://id.loc.gov/authorities/subjects/sh2003007761.…”
    Government Document Book
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  2. 2
    Charging explosives in drill holes of drift rounds in metal mines /

    Charging explosives in drill holes of drift rounds in metal mines / by Gardner, E. D. (Eugene Delos), 1885-

    Published 1927
    Subjects:
    Search for the full-text version of this title in HathiTrust
    Government Document Book
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