Supatra Jirananthanaporn. (1988) An experiment using Thai orthography with Khmu Phonology at Ban Nam Pan in Nan. Mahidol University,:ม.ป.ท.Supatra Jirananthanaporn. 1988. An experiment using Thai orthography with Khmu Phonology at Ban Nam Pan in Nan. ม.ป.ท.:Mahidol University,;Supatra Jirananthanaporn. An experiment using Thai orthography with Khmu Phonology at Ban Nam Pan in Nan. ม.ป.ท.:Mahidol University, 1988. Print.