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Start Over Subjects Child ✖Remove constraint Subjects: Child Authors Jeffries, B. Joy (Benjamin Joy), 1833-1915 ✖Remove constraint Authors: Jeffries, B. Joy (Benjamin Joy), 1833-1915 Titles Report of the examination of 27,927 school children for color-blindness ✖Remove constraint Titles: Report of the examination of 27,927 school children for color-blindness

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  • Jeffries, B. Joy (Benjamin Joy), 1833-19151

  • Report of the examination of 27,927 school children for color-blindness1