[Features of the transition to new reproductive behavior in Bulgaria (an attempt to explain the "Bulgarian anomaly")].
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D002031:Bulgaria; D003710:Demography; D019049:Developed Countries; D005060:Europe; D005061:Europe, Eastern; D005298:Fertility; D005843:Geography; D011153:Population; D011157:Population Dynamics; D012725:Sexual Behavior
Bulgaria; Demographic Factors; Developed Countries; Eastern Europe; Europe; Fertility--changes; Geographic Factors; Historical Survey; Population; Population Dynamics; Reproductive Behavior