[Epidemiology of profound mental retardation in Poland. Organization of studies and method of samples selection].
D000293:Adolescent; D002648:Child; D002675:Child, Preschool; D006801:Humans; D008607:Intellectual Disability / Q000453:epidemiology*; D009934:Organization and Administration; D011044:Poland; D012494:Sampling Studies
Epidemiologia głebokiego upośledzenia umysłowego W polsce. Organizacja badań i metoda wyboru próbt.