Onlao S. Grouping of Tai Languages in Nam Paw Basin, Khamkeut District, Bolikhamxai Province, Lao People’s Democratic Republic by Using Criteria of Tonal Sound Changes. JMS [Internet]. 2013 Mar. 11 [cited 2024 May 1];6(3):47-72. Available from: https://so03.tci-thaijo.org/index.php/mekongjournal/article/view/6804