title: [The effect of sociological and biological factors in perinatal mortality. (SZO--Statistical Report 1976)].
mesh_terms: D005260:Female; D005313:Fetal Death; D006801:Humans; D007223:Infant; D007226:Infant Mortality; D007231:Infant, Newborn; D007391:International Cooperation; D011247:Pregnancy; D012959:Socioeconomic Factors
vernacular_title: Vliv sociálních a biologických faktorů na perinatální úmrtnost. (SZO-Statistical Report 1976).