[Infant mortality in Czechoslovakia during 1970-1974].
D003604:Czechoslovakia; D006801:Humans; D007223:Infant; D007226:Infant Mortality; D007231:Infant, Newborn; D012189:Retrospective Studies
Príspĕvek k problematice ponovorozenecké úmrtnosti v CSR v letech 1970-1974.