Services to the mentally retarded: a brief survey in contrasts between, Great Britain and the United States.
D003287:Contrast Media; D003625:Data Collection; D004495:Education of Persons with Intellectual Disabilities; D006801:Humans; D019989:Persons with Intellectual Disabilities; D006113:United Kingdom; D014481:United States; D014937:Work
D003287:Contrast Media
MENTAL DEFICIENCY/education