[Percentage of neonatal and low-birth-weight infant mortality in general infant mortality 1970-1979].
D005260:Female; D006801:Humans; D007226:Infant Mortality; D007230:Infant, Low Birth Weight; D007231:Infant, Newborn; D008297:Male; D011044:Poland; D012737:Sex Factors; D014505:Urban Population
Udział zgonów noworodków i niemowlat z niska masa urodzeniowa w ogólnej umieralności niemowlat w latach 1970-1979.