[ON THE EVOLUTION OF THE NEONATAL MORTALITY RATE IN DDR].
D005075:Biological Evolution; D005858:Germany; D005859:Germany, East; D006801:Humans; D007223:Infant; D007226:Infant Mortality; D007231:Infant, Newborn
GERMANY, EAST; INFANT MORTALITY; INFANT, NEWBORN
ZUR ENTIWKLUNG DER TOTGEBORENENHAEUFIGKEIT IN DER DDR.