The effects of student life upon the eyesight
By: by A.W. Calhoun
Contributors: United States. Bureau of Education
Series: U.S. Bureau of education. Circulars of information -- 1881, no. 6; Circular of information (United States. Bureau of Education) -- 1881, no. 6
Publisher: Govt. Print. Off.
Published: 1881
Place of publication: Washington
Language: eng
Number of pages: 29
Subjects: School hygiene; Eye; Diseases