Boontiam Punpeng. 1993. Studies on novel raw-starch-digesting microbial amylases. Kyushu:Kyushu University;
Boontiam Punpeng. (1993) Studies on novel raw-starch-digesting microbial amylases (รายงานผลงานวิจัย). Kyushu University:Kyushu.
Boontiam Punpeng. Studies on novel raw-starch-digesting microbial amylases. Kyushu:Kyushu University, 1993.
Boontiam Punpeng. (1993) Studies on novel raw-starch-digesting microbial amylases (รายงานผลงานวิจัย). Kyushu University:Kyushu.