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文献信息
Number of Children in a FamilyMother and Child CarePer Capita ConsumptionSocioeconomic DevelopmentPopulation ControlPlanning ProgramClose CorrelationChild MortalityEconomic BenefitsNumber of ChildrenLiving ConditionsDeveloped CountriesFamily PlanningNatural ResourcesMortality RateDeveloping CountriesHygiene
vol.47 (1972)
vol.39 (1970)