Czechoslovak population trend in 1980.
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D003604:Czechoslovakia; D003710:Demography; D019049:Developed Countries; D005060:Europe; D005061:Europe, Eastern; D011153:Population; D011154:Population Characteristics; D011157:Population Dynamics; D011158:Population Growth; D012106:Research
Czechoslovakia; Demographic Factors; Developed Countries; Eastern Europe; Europe; Natural Increase; Population; Population Dynamics; Population Growth; Population Statistics; Research Methodology