Studies in illumination
Subtitle: 1 : The hygienic conditions of illumination in certain post offices, especially relating to visual defects and efficiency
By: by Lewis R. Thompson [and others]
Publisher: Government Printing Office
Published: 1924
Place of publication: Washington
Language: eng
Number of pages: 118
Notes: At head of t.p.: Treasury Department, United States Public Health Service.

Includes bibliographic references and index.