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Irvin Berlin Irvin Valdez Irvine, California Irving Fisher Irving Langmuir Irvine Page Irving Weissman Irvingia gabonensis Irvin Reyna Irving, TexasTài liệu tham khảo
WikiPedia: Irving_Fisher http://www.news.sanotc.com/Print.aspx?hl=vi&item=3... http://homepage.newschool.edu/het//profiles/fisher... https://web.archive.org/web/20090304092947/http://...