Technique of economic studies of lighting in industry
By: by J.W. Barker
Published: 1927
Place of publication: New York]
Language: eng
Number of pages: 10
Subjects: Lighting
Other titles: Lighting in industry
Notes: Caption title.

"A paper presented before the twenty-first annual convention of the Illuminating engineering society, Chicago, Ill., October 11-14, 1927."