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- Author(s):
- Cohn, Hermann, 1838-1906
- Publication:
- [Chicago? : s.n., 1893?]
- Subject(s):
- Myopia -- epidemiology
Myopia -- prevention & control
Child
Cross-Cultural Comparison
Cross-Sectional Studies
Prevalence
Schools
- Author(s):
- Derby, Hasket, 1835-1914, author
- Publication:
- Cambridge : Printed at the Riverside Press, 1877
- Subject(s):
- Myopia -- epidemiology
Students
Ophthalmology -- instrumentation
Snellen, H. (Herman), 1834-1908.
Harvard College (1780- )
- Author(s):
- Dowling, Francis, M.D., author
- Publication:
- [Chicago?] : [publisher not identified], [1891?]
- Subject(s):
- Myopia -- epidemiology
Schools
Lighting
Child
Adolescent
Ohio