Preecha Leangaramgul. 1996. Complementary DNA cloning of Aspergillus niger glucoamylase gene. Faculty of Graduate Studies, Mahidol University;
Preecha Leangaramgul. (1996) Complementary DNA cloning of Aspergillus niger glucoamylase gene . Mahidol University/Bangkok.
Preecha Leangaramgul. Complementary DNA cloning of Aspergillus niger glucoamylase gene. . Bangkok:Mahidol University, 1996.
Preecha Leangaramgul. (1996) Complementary DNA cloning of Aspergillus niger glucoamylase gene . Mahidol University/Bangkok.