Wimon Thanapaes. (1998) Language use of the Isan group in Palan village Tambol Pong-Noi, Mae-Chan district Chiang-Rai province. Mahidol University,:ม.ป.ท.Wimon Thanapaes. 1998. Language use of the Isan group in Palan village Tambol Pong-Noi, Mae-Chan district Chiang-Rai province. ม.ป.ท.:Mahidol University,;Wimon Thanapaes. Language use of the Isan group in Palan village Tambol Pong-Noi, Mae-Chan district Chiang-Rai province. ม.ป.ท.:Mahidol University, 1998. Print.