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A Study of the Modification of Parental Attitudes Toward an Understanding of Mentally Retarded Children, April 1, 1958 to August 31, 1959
University of Minnesota. Institute of Child Development and WelfareDale B. Harris
出版Minneapolis, 1959
URLhttp://books.google.com.hk/books?id=cL09AAAAYAAJ&hl=&source=gbs_api