[DEVELOPMENT, PRESENT STATE AND TASKS OF CHILD AND ADOLESCENT HYGIENE IN THE BULGARIAN PEOPLE'S REPUBLIC].
D000293:Adolescent; D002031:Bulgaria; D002648:Child; D002669:Child Welfare; D006801:Humans; D006920:Hygiene; D007802:Language; D013222:State Medicine; D014937:Work
ADOLESCENCE; BULGARIA; CHILD; CHILD WELFARE; HYGIENE; STATE MEDICINE
ROZVOJ, STAV A 'UKOLY HYGIENY D ET'I A DOROSTU V BULHARSK'E LIDOV'E REPUBLICE.