Thirawan Sitthai. 1994. A study of functionalization of chitosan. Faculty of Graduate Studies, Mahidol University;
Thirawan Sitthai. (1994) A study of functionalization of chitosan . Mahidol University/Bangkok.
Thirawan Sitthai. A study of functionalization of chitosan. . Bangkok:Mahidol University, 1994.
Thirawan Sitthai. (1994) A study of functionalization of chitosan . Mahidol University/Bangkok.