Songwut Intajurk. (2000) Improving graduate education with a digital library of research documents. Mahidol University,:ม.ป.ท.Songwut Intajurk. 2000. Improving graduate education with a digital library of research documents. ม.ป.ท.:Mahidol University,;Songwut Intajurk. Improving graduate education with a digital library of research documents. ม.ป.ท.:Mahidol University, 2000. Print.