[Regional differences in the level of mortality, 1980-1981].
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D003604:Czechoslovakia; D003710:Demography; D019049:Developed Countries; D005060:Europe; D005061:Europe, Eastern; D005843:Geography; D009026:Mortality; D011153:Population; D011157:Population Dynamics
Czechoslovakia; Demographic Factors; Developed Countries; Differential Mortality; Eastern Europe; Europe; Geographic Factors; Mortality; Population; Population Dynamics