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 .
<br/><br/> At head of title: United States Department of Labor. W.N. Doak, secretary. Bureau of Labor Statistics. Ethelbert Stewart, commissioner. 
<br/><br/><label>LCCN: </label>l  31000153  
<br/><br/><label>Subjects--Topical Terms: </label><br/>Factories--Lighting.
<br/><br/><label>LC Class. No.: </label>HD8051  / .A62 no. 556