Changes in technology and labor requirements in the crushed-stone industry / by Harry S. Kantor and Geoffrey A. Saeger
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Kantor, Harry S. (författare)
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Saeger, Geoffrey A. (författare)
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- United States. Bureau of Mines
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Alternativt namn: Bureau of mines
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Alternativt namn: United States. Department of the Interior. Bureau of Mines
- Philadelphia, Pa. : Works progress administration, National research project, in cooperation with Department of the interior, Bureau of mines, 1939
- Engelska xvii, 169 p.
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Serie: National research project on reemployment opportunities and recent changes in industrial techniques. Mineral technology and output per man studies. [Report no. E-8]
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