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WikiPedia: Niigata (thành phố) http://www.stat.go.jp/data/kokusei/2010/jinsoku/zu... http://www.city.niigata.jp/e_page/e_index.html http://www.city.niigata.jp/e_page/top.html http://www.city.niigata.niigata.jp/e_page/e_index.... //tools.wmflabs.org/geohack/geohack.php?language=v... https://web.archive.org/web/20060319075005/http://... https://web.archive.org/web/20150923203950/http://... https://commons.wikimedia.org/wiki/Category:Niigat...