title: Problems in etiological classifications of mental retardation.
authors: Graduate School of Education, Philadelphia, PA 19104-6216.
authors: J F
authors: JF
authors: Goodman
mesh_terms: D002547:Cerebral Palsy / Q000523:psychology; D004314:Down Syndrome / Q000523:psychology; D006801:Humans; D008607:Intellectual Disability / Q000145:classification* / Q000175:diagnosis / Q000209:etiology; D007361:Intelligence Tests; D012959:Socioeconomic Factors