01243cam a22002891 4500 l 39000111 DLC 20260227111537.0 920925s1939 dcuf 000 0 eng l 39000111 (OCoLC)27282700 DLC MdBJ DLC premarc HD7279.U6 N55 Flexner, Jean Atherton. The work of an industrial hygiene division in a state department of labor ... Washington, U.S. Govt. print. off., 1939. vii, 24 p. pl. 23 cm. U.S. Dept. of labor. Division of labor standards. Bulletin no. 31 At head of title: United States Department of labor. Frances Perkins, secretary. Division of labor standards. Verne A. Zimmer, director. A report based on data dealing with the Industrial hygiene division of the New York (State) Department of labor. cf. Foreword. "By Jean A. Flexner." - Letter of transmittal. Labor bureaus United States. Industrial hygiene United States. New York (State) Bureau of industrial hygiene. United States. Bureau of Labor Standards. Bulletin ... no. 31. 36306 36306