1. The occurrence of myopia among school children: translated from the German of Dr. Hermann Cohn's work on "Hygiene of the eyes" Author(s): Cohn, Hermann, 1838-1906 Publication: [Chicago? : s.n., 1893?] Subject(s): Myopia -- epidemiologyMyopia -- prevention & controlChildCross-Cultural ComparisonCross-Sectional StudiesPrevalenceSchools
