Ladapan Saengklai. (1991) Heterologous transformation of aspergillus niger. Mahidol University,:ม.ป.ท.Ladapan Saengklai. 1991. Heterologous transformation of aspergillus niger. ม.ป.ท.:Mahidol University,;Ladapan Saengklai. Heterologous transformation of aspergillus niger. ม.ป.ท.:Mahidol University, 1991. Print.