The eyesight of school children : defective vision as related to school environment, and methods of prevention and correction / by J.H. Berkowitz.
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| Main Author: | |
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| Format: | Government Document Book |
| Language: | English |
| Published: |
Washington :
Govt. print. off,
1920.
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| Series: | Bulletin (United States. Bureau of Education) ;
1919, no. 65. |
| Subjects: |