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- catalog contributor b8655285.
- catalog contributor b8655286.
- catalog created "1911.".
- catalog date "1911".
- catalog date "1911.".
- catalog dateCopyrighted "1911.".
- catalog extent "x, 275 p.".
- catalog issued "1911".
- catalog issued "1911.".
- catalog language "eng".
- catalog publisher "Philadelphia, Psychological Clinic Press,".
- catalog spatial "Pennsylvania.".
- catalog subject "Children with mental disabilities Education Pennsylvania.".
- catalog subject "LC4633.P5 P4".
- catalog title "The special class for backward children; an educational experiment conducted for the instruction of teachers and other students of child welfare, by the Psychological Laboratory and Clinic of the University of Pennsylvania, reported by Lightner Witmer.".
- catalog type "text".