Jintana Yunyongwattanakorn และ Jitladda Sakdapipanich. (2004) Preparation and development of highly purified Hevea rubber. Mahidol University:ม.ป.ท.Jintana Yunyongwattanakorn และ Jitladda Sakdapipanich. 2004. Preparation and development of highly purified Hevea rubber. ม.ป.ท.:Mahidol University;Jintana Yunyongwattanakorn และ Jitladda Sakdapipanich. Preparation and development of highly purified Hevea rubber. ม.ป.ท.:Mahidol University, 2004. Print.