[DATA ON INFANT MORTALITY IN HUNGARY AND CZECHOSLOVAKIA].
D003604:Czechoslovakia; D006801:Humans; D006814:Hungary; D007223:Infant; D007226:Infant Mortality
CZECHOSLOVAKIA; HUNGARY; INFANT MORTALITY
POZN'AMKY KE KOJENECK'E 'UMRTNOSTI V MA DARSKU A CESKOSLOVENSKU.