The Demopædia Encyclopedia on Population is under heavy modernization and maintenance. Outputs could look bizarre, sorry for the temporary inconvenience
搜尋重複檔案
依據雜湊值 (Hash) 來搜尋重複的檔案。
The Demopædia Encyclopedia on Population is under heavy modernization and maintenance. Outputs could look bizarre, sorry for the temporary inconvenience
United nations
Departement of Economic and Social Affairs
Population Division
International Union
for the Scientific Study
of Population