title: THE MEANING OF INDEFINITE NUMBER TERMS FOR MENTALLY RETARDED CHILDREN.
mesh_terms: D000293:Adolescent; D002648:Child; D003210:Concept Formation; D005260:Female; D006801:Humans; D008607:Intellectual Disability; D019989:Persons with Intellectual Disabilities; D047929:Term Birth
keywords: ADOLESCENCE; CONCEPT FORMATION; MENTAL RETARDATION