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Start Over Subjects Asthenopia ✖Remove constraint Subjects: Asthenopia Authors Donders, F. C. (Franciscus Cornelis), 1818-1889, author ✖Remove constraint Authors: Donders, F. C. (Franciscus Cornelis), 1818-1889, author Copyright Public domain ✖Remove constraint Copyright: Public domain Dates by Range 1850-1899 ✖Remove constraint Dates by Range: 1850-1899

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  • Donders, F. C. (Franciscus Cornelis), 1818-1889, author1