Hours and earnings in bituminous coal mining, 1929
Series: Bulletin of the United States Bureau of Labor Statistics -- no. 516; Wages and hours of labor series; Bulletin of the United States Bureau of Labor Statistics -- 516
Publisher: Govt. Print. off.
Published: 1930
Place of publication: Washington
Language: eng
Number of pages: 63
Subjects: Hours of labor; Wages; Coal miners; Coal mines and mining