[Trend of aging and defeminization of the rural and urban population of Czechoslovakia in 1961-1970].
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D003604:Czechoslovakia; D003710:Demography; D019049:Developed Countries; D005060:Europe; D005061:Europe, Eastern; D005843:Geography; D011153:Population; D011154:Population Characteristics
Czechoslovakia; Demographic Factors; Developed Countries; Eastern Europe; Europe; Geographic Factors; Population; Population Characteristics; Spatial Distribution