Walaipan Hansawata และ Anarai Singhaohandhu. (1975) A study of the reactivity of sodium ions in etherification reaction of cellulose. Chulalongkorn University.:ม.ป.ท.Walaipan Hansawata และ Anarai Singhaohandhu. 1975. A study of the reactivity of sodium ions in etherification reaction of cellulose. ม.ป.ท.:Chulalongkorn University.;Walaipan Hansawata และ Anarai Singhaohandhu. A study of the reactivity of sodium ions in etherification reaction of cellulose. ม.ป.ท.:Chulalongkorn University. 1975. Print.