©2013 National Research Council of Thailand
Pusit Rujjanavet. 1986. The phonology of Ugong in Uthaithani province. Faculty of Graduate Studies, Mahidol University;
Pusit Rujjanavet. (1986) The phonology of Ugong in Uthaithani province . Mahidol University/Bangkok.
Pusit Rujjanavet. The phonology of Ugong in Uthaithani province. . Bangkok:Mahidol University, 1986.
Pusit Rujjanavet. (1986) The phonology of Ugong in Uthaithani province . Mahidol University/Bangkok.