[SCIENTIFIC METHODS AND PRACTICE AND CHILD AND ADOLESCENT HYGIENE: SURVEY OF RESEARCH RESULTS].
D000293:Adolescent; D002031:Bulgaria; D002648:Child; D002669:Child Welfare; D003625:Data Collection; D006801:Humans; D006920:Hygiene; D012106:Research; D013222:State Medicine
ADOLESCENCE; BULGARIA; CHILD; CHILD WELFARE; HYGIENE; RESEARCH; STATE MEDICINE
METODY V EDECK'E PR'ACE A PRAXE V HYGIEN E D ET'I A DOROSTU; P REHLED V'YSLEDKU V'YZKUMU.