Studies of the effects of long working hours. - Kossoris, Max Davis ([Washington, U.S. Govt. Print. Off., 1944)
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.
Keywords: Hours of labor; Industrial efficiency