著者名,書名,版表示,出版者名,出版年,シリーズ名,番号,ISBN,ISSN,URL South Africa. Central Statistical Services,"Ouderdom volgens ontwikkelingstreek, statistiese streek en distrik = Age by development region, statistical region and district",,Central Statistical Service,1992,Bevolkingsensus 1991 = Population census 1991,,0621146463,,https://cir.nii.ac.jp/crid/1130000795715731584