01142cam a22002531 4500 l 31000153 DLC 20260227111533.0 910920s1931 dcuf f000 0 eng c l 31000153 (OCoLC)24425278 U.S. Dept. of Labor. Library CLU CLU DLC HD8051 .A62 no. 556 Illuminating Engineering Society. Code of lighting: factories, mills and other work places. Revision of 1930. American standard, approved by the American Standards Association, August 18, 1930. Sponsor, Illuminating Engineering Society ... October, 1931. Washington, U.S. Govt. Print. Off., 1931. vi, 22 p. plates. 24 cm. Bulletin of the United States Bureau of Labor Statistics, no. 556 Safety code series At head of title: United States Department of Labor. W.N. Doak, secretary. Bureau of Labor Statistics. Ethelbert Stewart, commissioner. Factories Lighting. American Standards Association. United States. Bureau of Labor Statistics. 36034 36034