Language development and autistic behaviour in severely mentally retarded children.
D001321:Autistic Disorder; D002648:Child; D005868:Gestures; D006801:Humans; D007092:Imagination; D008607:Intellectual Disability; D007406:Interview, Psychological; D007804:Language Development; D010988:Play and Playthings; D013064:Speech Disorders; D014705:Verbal Behavior