[A NEW METHOD OF REPORTING THE BIRTH OF A CHILD AND OF PERINATAL MORTALITY].
D002648:Child; D003604:Czechoslovakia; D005260:Female; D006801:Humans; D007223:Infant; D007226:Infant Mortality; D007231:Infant, Newborn; D036801:Parturition; D054238:Perinatal Mortality; D011247:Pregnancy; D014798:Vital Statistics; D014944:World Health Organization
CZECHOSLOVAKIA; INFANT MORTALITY; INFANT, NEWBORN; VITAL STATISTICS; WORLD HEALTH ORGANIZATION
N EKOLIK POZN'AMEK K POSL'AN'I GYNEKOLOGICK'E SEKCE A K ORGANIZACI JEJ'I PR'ACE.