Hours and earnings in bituminous coal mining, 1922, 1924, and 1926
Series: Bulletin of the U.S. Bureau of Labor Statistics -- no.454; Bulletin of the United States Bureau of Labor Statistics -- 454
Publisher: Govt. print. off.
Published: 1927
Place of publication: Washington
Language: eng
Number of pages: 66
Subjects: Hours of labor; Wages; Coal miners; Coal mines and mining