Code of lighting : factories, mills and other work places
著者
書誌事項
Code of lighting : factories, mills and other work places
(Safety code series)(Bulletin / Bureau of Labor Statistics, no. 331)
G.P.O., 1923
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注記
At head of title: U.S. Department of Labor, Bureau of Labor Statistics
"American standard approved December 31, 1921, by American Engineering Standards Committee"
Includes index