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Studies in illumination : II. Relationship of illumination to ocular efficiency and ocular fatigue among letter separators in Chicago post office.

Bibliographic Details
Corporate Author:	United States. Department of Health, Education, and Welfare
Format:	Government Document eBook
Language:	English
Published:	[Washington] : GPO, 1929.
Subjects:	United States. > Occupational Safety and Health Administration. Eye > Diseases. Labor productivity. Electronic books.
Online Access:	Connect to the full text of this electronic document

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