https://www.thesaurus.asiana.net/vocab/ Ethnic Groups in Mekong River Basin (MRB) Wirapong Chansanam digital thesaurus; ethnic groups Wirapong Chansanam 2020-09-16 en-EN 2021-01-29 10:43:39 2021-05-28 09:19:45 ก่ายเซิ่งเทิ่ง (Kai Soeng Thoeng) 2021-01-29 10:43:39 2021-05-28 09:19:45https://www.thesaurus.asiana.net/vocab/xml.php?skosTema=687