Warasak Phuangcharoen. 1993. Speech perception ability of the persons who loss the high frequency. Faculty of Graduate Studies, Mahidol University;

Warasak Phuangcharoen. Speech perception ability of the persons who loss the high frequency. . Bangkok:Mahidol University, 1993.

Warasak Phuangcharoen. (1993) Speech perception ability of the persons who loss the high frequency . Mahidol University/Bangkok.