Nuchanart Waiyanont. (1998) Thavung phonology at Muang Khamkert, Bolikhamxai province, Lao P.D.R. Mahidol University,:ม.ป.ท.Nuchanart Waiyanont. 1998. Thavung phonology at Muang Khamkert, Bolikhamxai province, Lao P.D.R. ม.ป.ท.:Mahidol University,;Nuchanart Waiyanont. Thavung phonology at Muang Khamkert, Bolikhamxai province, Lao P.D.R. ม.ป.ท.:Mahidol University, 1998. Print.