Wage rates and working time in the bituminous coal industry, 1912-1922, with a summary of rates for separate occupations in each coal district in the United States / by Waldo E. Fisher ... and Anne Bezanson ...
- Philadelphia, University of Pennsylvania press, 1932.
xxii, 374 p. illus. (map) tables (part mounted fold.) diagrs. 24 cm.
- Industrial research dept., Wharton school of finance and commerce, University of Pennsylvania, Philadelphia. Research studies, 21.