[Some problems of studying child mortality].
D000367:Age Factors; D005260:Female; D006801:Humans; D007223:Infant; D007226:Infant Mortality; D007231:Infant, Newborn; D007232:Infant, Newborn, Diseases / Q000401:mortality; D008297:Male; D011247:Pregnancy; D011248:Pregnancy Complications; D014586:USSR
Nekotorye voprosy izucheniia detskoĭ smertnosti.