Srisakul Bootrachari. (1991) Improvement the primitive process of sa-paper making. Mahidol University,:ม.ป.ท.Srisakul Bootrachari. 1991. Improvement the primitive process of sa-paper making. ม.ป.ท.:Mahidol University,;Srisakul Bootrachari. Improvement the primitive process of sa-paper making. ม.ป.ท.:Mahidol University, 1991. Print.