The special class for backward children
Subtitle: 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
By: reported by Lightner Witmer.
Contributors: Witmer, Lightner, 1867-1956.
Publisher: Psychological Clinic Press
Published: 1911
Place of publication: Philadelphia
Language: eng
Number of pages: 275
Subjects: Children with mental disabilities -- Education -- Pennsylvania.