[Changes in migration regions of Czechoslovakia in the last 50 years].
Macka
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D003604:Czechoslovakia; D003710:Demography; D019049:Developed Countries; D004641:Emigration and Immigration; D005060:Europe; D005061:Europe, Eastern; D011153:Population; D011157:Population Dynamics
Czechoslovakia; Demographic Factors; Developed Countries; Eastern Europe; Europe; Historical Survey; Migration; Migration, Internal--changes; Population; Population Dynamics