Title: The Experimental Psychology of Mental Retardation, Author: Donald K. Routh
Title: Cognition in Special Children: Comparative Approaches to Retardation, Learning Disabilities, and Giftedness, Author: John G. Borkowski
Title: Developmental Disability and Behaviour / Edition 1, Author: Christopher Gillberg
Title: Retardation in Young Children: A Developmental Study of Cognitive Deficit / Edition 1, Author: Sarah H. Broman
Title: The Mentally Retarded Child, Author: Bloomsbury Academic