[PROBLEMS OF SCHOOL CHILDREN IN RELATION TO MENTAL HYGIENE].
D000293:Adolescent; D002648:Child; D003604:Czechoslovakia; D006801:Humans; D008603:Mental Health; D012572:School Health Services
ADOLESCENCE; CHILD; CZECHOSLOVAKIA; MENTAL HEALTH; SCHOOL HEALTH
PROBL'EMY  SKOLN'I ML'ADE ZE VE VZTAHU K DU SEVN'I HYGIEN E.