[The infant mortality rate in Bulgaria (1900-1990)].
Chalakova
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D002031:Bulgaria; D003710:Demography; D019049:Developed Countries; D004467:Economics; D005060:Europe; D005061:Europe, Eastern; D007226:Infant Mortality; D009026:Mortality; D011153:Population; D011157:Population Dynamics; D012106:Research
Bulgaria; Comparative Studies; Demographic Factors; Developed Countries; Eastern Europe; Economic Development; Economic Factors; Europe; Historical Survey; Infant Mortality--changes; Mortality; Population; Population Dynamics; Research Methodology; Studies