[Selected problems concerning changes in the population age structure in Czechoslovakia in comparison with those in Poland].
Palach
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D017677:Age Distribution; D000367:Age Factors; D003604:Czechoslovakia; D003710:Demography; D019049:Developed Countries; D005060:Europe; D005061:Europe, Eastern; D011044:Poland; D011153:Population; D011154:Population Characteristics; D012106:Research; D017678:Sex Distribution; D012737:Sex Factors
Age Distribution; Age Factors; Comparative Studies; Czechoslovakia; Demographic Factors; Developed Countries; Eastern Europe; Europe; Poland; Population; Population Characteristics; Research Methodology; Sex Distribution; Sex Factors; Studies