Udarat Boonraksa. (2007) Effect of cadmium levels on chromosome structure of catfish (Clarias batrachus). Mahidol University,:ม.ป.ท.Udarat Boonraksa. 2007. Effect of cadmium levels on chromosome structure of catfish (Clarias batrachus). ม.ป.ท.:Mahidol University,;Udarat Boonraksa. Effect of cadmium levels on chromosome structure of catfish (Clarias batrachus). ม.ป.ท.:Mahidol University, 2007. Print.