title: [The concept of mental deficiency and its incidence in Hungary].
mesh_terms: D000293:Adolescent; D001077:Aptitude Tests; D002648:Child; D002675:Child, Preschool; D004495:Education of Persons with Intellectual Disabilities; D004521:Educational Measurement; D006801:Humans; D006814:Hungary; D008607:Intellectual Disability / Q000453:epidemiology*
vernacular_title: Az értelmi fogyatékosság fogalma és hazai gyakorisága