Vichai Udomsriwatana. (1993) Effect of ultraviolet light on some entericbacteria in water. Mahidol University,:ม.ป.ท.Vichai Udomsriwatana. 1993. Effect of ultraviolet light on some entericbacteria in water. ม.ป.ท.:Mahidol University,;Vichai Udomsriwatana. Effect of ultraviolet light on some entericbacteria in water. ม.ป.ท.:Mahidol University, 1993. Print.