[Development of infant mortality during the past 30 years in Czechoslovakia].
D003604:Czechoslovakia; D005260:Female; D005313:Fetal Death / Q000453:epidemiology; D006801:Humans; D007226:Infant Mortality; D007231:Infant, Newborn; D011247:Pregnancy; D012189:Retrospective Studies
Vývoj kojenecké úmrtnosti za 30 let CSSR