[DISTRIBUTION OF RHEUMATISM AMONG STUDENTS IN BULGARIA IN 1960-1961].
D001699:Biometry; D002031:Bulgaria; D002648:Child; D006801:Humans; D007223:Infant; D012216:Rheumatic Diseases; D012213:Rheumatic Fever; D013223:Statistics as Topic; D013334:Students
BULGARIA; CHILD; INFANT; RHEUMATIC FEVER; STATISTICS
RAZPROSTRANENIE NA REVMATIZMA VSRED UCHENITSITE V NR BULGARIIA PREZ 1960-1961 GODINA.