title: Mental retardation. Twenty years later.
mesh_terms: D000328:Adult; D002648:Child; D002662:Child Health Services / Q000266:history / Q000331:legislation & jurisprudence; D004495:Education of Persons with Intellectual Disabilities / Q000266:history; D005260:Female; D049673:History, 20th Century; D006801:Humans; D008607:Intellectual Disability; D007883:Legislation, Medical / Q000266:history; D008297:Male; D008427:Maternal Health Services / Q000266:history / Q000331:legislation & jurisprudence; D011247:Pregnancy; D014481:United States