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National Research Project On Reemployment Opportunities And Recent Changes In Industrial Techniques U S
1
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Mechanization, employment, and output per man in bituminous-coal mining



Philadelphia, Pa. : Work Projects Administration, National Research Project in cooperation with Dept. of the Interior, Bureau of Mines, [1937-1939] 1939

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 Axe Kansas Collection  622.334 M464 1937    ---  Lib Use Only
2
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Mechanization trends in metal and nonmetal mining as indicated by sales of underground loading equip


Plein, Leopold Nicholas, 1897-
Philadelphia, Pa. : Works Progress Administration, 1937. 1937

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 Axe Special Collections Picher Mining  Y 3.W 89/2:42/E-3    ---  Lib Use Only
3
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Technology, employment, and output per man in phosphate-rock mining, 1880-1937


Haskell, A. Porter.
Philadelphia, Pa. : Works Progress Administration, 1938. 1938

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Location Call No. OPAC Message Status
 Axe Special Collections Picher Mining  Y 3.W 89/2:42/E-7    ---  Lib Use Only
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