Category: WPA  


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Technology, Employment, and Output Per Man in Phosphate-Rock Mining, 1880 - 1937.

By: Haskell, A. Porter, Jr. and O. E. Kiessling, Economist in Charge, Mineral Technology and Output Per Man Studies.

Price: $65.00

Publisher: Philadelphia, Pennsylvania: Works Progress Administration, National Research Project and Department of the Interior Bureau of Mines, Report No. E-7, November, 1938.

Seller ID: vita5471