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Showing 1 - 6 results of 6 for search 'Work Projects Administration, National Research Project : Department of the Interior, Bureau of Mines,', query time: 1.24s Refine Results
  1. 1
    Technology, employment, and output per man in petroleum and natural-gas production /
    “...Work Projects Administration, National Research Project : Department of the Interior, Bureau...”
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    Government Document eBook
  2. 2
    Technology, employment, and output per man in copper mining /
    by Leong, Yau Sing, 1899-
    Published 1940
    “...Work Projects Administration, National Research Project : Department of the Interior, Bureau...”
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    Government Document eBook
  3. 3
    Technology, employment, and output per man in iron mining /
    by Yaworski, Nicholas
    Published 1940
    “...Work Projects Administration, National Research Project : Department of the Interior, Bureau...”
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    Government Document eBook
  4. 4
    Employment and income from gold placering by hand methods, 1935-37 /
    “...Work Projects Administration, National Research Project : Department of the Interior, Bureau...”
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    Government Document eBook
  5. 5
    Mechanization, employment, and output per man in bituminous-coal mining /
    “...Work Projects Administration, National Research Project : Department of the Interior, Bureau...”
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    Government Document eBook
  6. 6
    Rock drilling /
    “...Work Projects Administration, National Research Project : Department of the Interior, Bureau...”
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    Government Document eBook
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