Production, employment, and output per man in gypsum mining

Author: Newcomb, Robinson,
Additional Authors: Peterson, Knute.
Year: 1940
Document Type: USBI
Issuing Agency: U.S. Dept. of the Interior, Bureau of Mines,
SUDOC: I 28.27:7134
Series: Information circular / United States Department of the Interior, Bureau of Mines ;
Report Number: 7134
Subjects: Gypsum--United States
Gypsum industry--United States
Gypsum mines and mining--United States
Link: https://hdl.handle.net/2027/mdp.39015078534396

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