Vimonwan Nakiem. (1995) Structure of the testis of Rana tigerina and its changes during development and seasonal variation. Mahidol University,:ม.ป.ท.Vimonwan Nakiem. 1995. Structure of the testis of Rana tigerina and its changes during development and seasonal variation. ม.ป.ท.:Mahidol University,;Vimonwan Nakiem. Structure of the testis of Rana tigerina and its changes during development and seasonal variation. ม.ป.ท.:Mahidol University, 1995. Print.