title: Some social and biological factors related to infant mortality. (A study based on national statistics).
mesh_terms: D000349:Africa; D001208:Asia; D005060:Europe; D005298:Fertility; D007226:Infant Mortality; D009026:Mortality; D009656:North America; D009747:Nutritional Physiological Phenomena; D012959:Socioeconomic Factors; D013020:South America