[Analysis of perinatal mortality in hospitals and maternity wards as well as under the supervision of rural and urban midwives in 1961-1964 (according to data from 17 regions and 5 seperate cities)].
D005260:Female; D005313:Fetal Death / Q000453:epidemiology*; D006801:Humans; D007226:Infant Mortality; D007231:Infant, Newborn; D008428:Maternal Mortality; D011044:Poland; D011247:Pregnancy
Analiza umieralności okołoporodowej w szpitalach, izbach porodowych i w działalności połoznych wiejskich i miejskich w latach 1961-1964.