01013cam a22002651 4500 l 44000221 DLC 20260227111539.0 790508m19449999dcua f000 0 eng c l 44000221 (OCoLC)4939940 U.S. Dept. of Labor. Libr. WMUW OCoLC DLC HD8051 .A62 no. 791, Coy 2. 331.81 Kossoris, Max Davis. Studies of the effects of long working hours. By Max D. Kossoris. [Washington, U.S. Govt. Print. Off., 1944- v. tables, diagrs. 23 cm. U.S. Bureau of Labor Statistics. Bulletin no. 791, 791-A At head of title: United States Dept. of Labor, Frances Perkins, Secretary. Bureau of Labor Statistics, Isador Lubin, Commissioner (on leave) A.F. Hinrichs, Acting Commmissioner. Appears also in part in the Monthly labor review. Hours of labor. Industrial efficiency. 36478 36478