Mechanization, employment, and output per man in bituminous-coal mining, by Willard E. Hotchkiss, F.G. Tryon, Charlotte K. Warner, L.N. Plein, Walter M. Dake, R.L. Anderson, J.J. Gallagher, and Margaret H. Schoenfeld. Willard E. Hotchkiss.
Mechanization, employment, and output per man in bituminous-coal mining, by Willard E. Hotchkiss, F.G. Tryon, Charlotte K. Warner, L.N. Plein, Walter M. Dake, R.L. Anderson, J.J. Gallagher, and Margaret H. Schoenfeld

Mechanization, employment, and output per man in bituminous-coal mining, by Willard E. Hotchkiss, F.G. Tryon, Charlotte K. Warner, L.N. Plein, Walter M. Dake, R.L. Anderson, J.J. Gallagher, and Margaret H. Schoenfeld

Philadelphia: Work Projects Administration, National Research Project, in coopeartion with Department of the Interior, Bureau of Mines, 1939. 2 vols. [xxx, 436p.], wraps chipped along the spines, neatly ex libris, illus., maps, tables. Report no. E-9.

Cat.No: 48073

Price: $50.00