[Remarks on the reduction of infantile mortality in the rural population of the Sierpc County in the years 1967-1971].
D006801:Humans; D007223:Infant; D007226:Infant Mortality; D011044:Poland; D012424:Rural Population; D014798:Vital Statistics
Uwagi w sprawie obnizenia umieralności niemowlat w srodowisku wiejskim w powiecie Sierpc.