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Ubon Ratchathani (tỉnh) Ubon Ratchathani Ubuntu Ubuntu Touch Ubuntu One Ubuntu MATE Ubuntu Software Center Ubort Udon Ubuntu (typeface)Tài liệu tham khảo
WikiPedia: Ubon_Ratchathani http://www.citypopulation.de/Thailand-Cities.html http://www.tourismthailand.org/Where-to-Go/Ubon-Ra... //tools.wmflabs.org/geohack/geohack.php?language=v... https://goo.gl/maps/ZU6PALjr5h82 https://web.archive.org/web/20150625114144/http://... https://commons.wikimedia.org/wiki/Category:Ubon_R...