Ritonga และ Muchtor. (1989) Vascularization of tree shrew's olfactory bulb as revealed by plastic corrosion cast technique and viewed under SEM. Mahidol University,:ม.ป.ท.Ritonga และ Muchtor. 1989. Vascularization of tree shrew's olfactory bulb as revealed by plastic corrosion cast technique and viewed under SEM. ม.ป.ท.:Mahidol University,;Ritonga และ Muchtor. Vascularization of tree shrew's olfactory bulb as revealed by plastic corrosion cast technique and viewed under SEM. ม.ป.ท.:Mahidol University, 1989. Print.