title: [ON SOME CRUCIAL PROBLEMS IN OLIGOPHRENIA].
mesh_terms: D000293:Adolescent; D002648:Child; D006801:Humans; D007223:Infant; D008607:Intellectual Disability
keywords: ADOLESCENCE; CHILD; INFANT; MENTAL RETARDATION
vernacular_title: O NEKOTORYKH UZLOVYKH VOPROSAKH UCHENIIA OB OLIGOFRENII.