[Development of defeminization in 1900-2000 and its relations to the aging process of the Czechoslovak population].
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D003604:Czechoslovakia; D003710:Demography; D019049:Developed Countries; D005060:Europe; D005061:Europe, Eastern; D011153:Population; D011154:Population Characteristics
Czechoslovakia; Demographic Factors; Developed Countries; Eastern Europe; Europe; Population; Population Characteristics