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