[Statistical surveys].
D003604:Czechoslovakia; D003625:Data Collection; D003710:Demography; D019049:Developed Countries; D005060:Europe; D005061:Europe, Eastern; D005298:Fertility; D006079:Government Publications as Topic; D011153:Population; D011157:Population Dynamics; D012106:Research; D012494:Sampling Studies; D013223:Statistics as Topic
Czechoslovakia; Demographic Factors; Developed Countries; Eastern Europe; Europe; Fertility--statistics; Government Publication; Population; Population Dynamics--statistics; Research Methodology; Sampling Studies; Statistics; Studies; Surveys