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Dunham Jackson Dunham, Quận McHenry, Illinois Dunham, Quận Washington, Ohio Dunam Durham, North Carolina Durham (hạt) Durham Durham, Oregon Dungamal Durham Alliance Combination LeagueTài liệu tham khảo
WikiPedia: Dunham Jackson http://genealogy.math.ndsu.nodak.edu/html/id.phtml... http://www.math.technion.ac.il/hat/dunham.jpg http://www.ams.org/bull/1948-54-09/S0002-9904-1948... //www.ams.org/mathscinet-getitem?mr=1565085 //doi.org/10.1090%2Fs0002-9904-1948-09068-1 http://www.maa.org/history/presidents/jackson.html https://web.archive.org/web/20070930014530/http://...