Thaned Pongjanyakul. (1997) Development of dextromethorphan sustained release suspension prepared by ion exchange method. Mahidol University,:ม.ป.ท.Thaned Pongjanyakul. 1997. Development of dextromethorphan sustained release suspension prepared by ion exchange method. ม.ป.ท.:Mahidol University,;Thaned Pongjanyakul. Development of dextromethorphan sustained release suspension prepared by ion exchange method. ม.ป.ท.:Mahidol University, 1997. Print.