Social and biological factors in infant mortality. I. Objects and methods.
D001685:Biological Factors; D005260:Female; D006801:Humans; D007223:Infant; D007226:Infant Mortality; D011247:Pregnancy; D011256:Pregnancy Outcome; D050497:Stillbirth; D014798:Vital Statistics
D001685:Biological Factors
INFANT; STILLBIRTH; VITAL STATISTICS