[Historia magistra vitae:  on the methods of historical demography].
Botev
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D002031:Bulgaria; D003710:Demography; D019049:Developed Countries; D005060:Europe; D005061:Europe, Eastern; D011153:Population; D011157:Population Dynamics; D012106:Research; D012107:Research Design; D013223:Statistics as Topic
Bulgaria; Data Analysis; Data Quality; Demographic Factors; Developed Countries; Eastern Europe; Error Sources; Estimation Technics; Europe; Historical Survey; Indirect Estimation Technics; Interdisciplinary Studies; Measurement; Population; Population Dynamics; Research Methodology