Krissada Sang sing และ Kannikar Teerawatnnasuk; Arak Chantuma; Sornprach Thanisawanyangkura; Kumut Sangkhasila; Poonpipope Kasemsap. (2003) Study on Leaf Stomatal Conductance of Rubber. <i>Thai Agricultural Research Journal</i>, <i>21</i>(3), 248-258.Krissada Sang sing และ Kannikar Teerawatnnasuk; Arak Chantuma; Sornprach Thanisawanyangkura; Kumut Sangkhasila; Poonpipope Kasemsap. "Study on Leaf Stomatal Conductance of Rubber". Thai Agricultural Research Journal 21 (2003):248-258.Krissada Sang sing และ Kannikar Teerawatnnasuk; Arak Chantuma; Sornprach Thanisawanyangkura; Kumut Sangkhasila; Poonpipope Kasemsap. Study on Leaf Stomatal Conductance of Rubber. Department of Agriculture:ม.ป.ท. 2003.