Pornchai Luangborisut. (1996) Cultivation of Rana tigerina and R. catesbeiana using artificial feed. Mahidol University,:ม.ป.ท.Pornchai Luangborisut. 1996. Cultivation of Rana tigerina and R. catesbeiana using artificial feed. ม.ป.ท.:Mahidol University,;Pornchai Luangborisut. Cultivation of Rana tigerina and R. catesbeiana using artificial feed. ม.ป.ท.:Mahidol University, 1996. Print.