Mechanization, employment, and output per man in bituminous-coal mining /

Bibliographic Details
Main Author:	Hotchkiss, Willard E. (Willard Eugene), 1874-1956 (Author)
Format:	Government Document eBook
Language:	English
Published:	Philadelphia, Pennsylvania : Work Projects Administration, National Research Project : Department of the Interior, Bureau of Mines, 1940.
Series:	Mineral technology and output per man studies ; rept. no. E-9.
Subjects:	Bituminous coal industry > United States > Statistics. Bituminous coal mines and mining > Labor productivity > United States > Statistics. Coal miners > Effect of technological innovations on > United States. Coal-mining machinery > United States. Coal miners. Coal-mining machinery. United States.
Online Access:	https://purl.fdlp.gov/GPO/gpo111124

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