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WikiPedia: Grumman_G-21_Goose http://www.antillesseaplanes.com/ http://www.canada.com/topics/news/story.html?id=26... http://goosecentral.web.officelive.com/ http://www.nasm.si.edu/research/aero/aircraft/grum... https://web.archive.org/web/20050127043917/http://... https://commons.wikimedia.org/wiki/Category:Grumma...