Suchitra Sangkasuwan. (1987) Characteristic patterns of diphitheria toxin by gel electrophoresis. Mahidol University,:ม.ป.ท.Suchitra Sangkasuwan. 1987. Characteristic patterns of diphitheria toxin by gel electrophoresis. ม.ป.ท.:Mahidol University,;Suchitra Sangkasuwan. Characteristic patterns of diphitheria toxin by gel electrophoresis. ม.ป.ท.:Mahidol University, 1987. Print.