[Changes in world fertility, 1960-1976].
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D003604:Czechoslovakia; D003710:Demography; D019049:Developed Countries; D005060:Europe; D005061:Europe, Eastern; D005298:Fertility; D006079:Government Publications as Topic; D011153:Population; D011157:Population Dynamics
Czechoslovakia; Demographic Factors; Developed Countries; Eastern Europe; Europe; Fertility; Government Publication; Population; Population Dynamics