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Ubol Ratana Ubolratana (huyện) Ubort Uboldo Ubon Ratchathani (tỉnh) Ubon RatchathaniTài liệu tham khảo
WikiPedia: Ubolratana_(huyện) http://www.amphoe.com/menu.php?mid=1&am=53&pv=5 http://www.ubolratanadoc.com //tools.wmflabs.org/geohack/geohack.php?language=v... http://khonkaen.doae.go.th/ubolrattana/data/%E0%B8... http://www.ratchakitcha.soc.go.th/DATA/PDF/2517/D/... http://www.ratchakitcha.soc.go.th/DATA/PDF/2522/A/... https://web.archive.org/web/20070928105730/http://...