[From the beginning of vital statistics].
Sekera
V
V
D003604:Czechoslovakia; D019049:Developed Countries; D005060:Europe; D005061:Europe, Eastern; D011154:Population Characteristics; D012106:Research; D014798:Vital Statistics
Czechoslovakia; Developed Countries; Eastern Europe; Europe; Methods Of Historical Demography; Population Statistics; Research Methodology; Vital Statistics