Kleopan Suwanarak และ Sermsiri Kongsaengdao. (1996) Competitive Effects between Purple Nutsedge (Cyperus rotundus Linn.) and Sugarcane. <i>Thai Agricultural Research Journal</i>, <i>14</i>(1), 28-37.Kleopan Suwanarak และ Sermsiri Kongsaengdao. "Competitive Effects between Purple Nutsedge (Cyperus rotundus Linn.) and Sugarcane". Thai Agricultural Research Journal 14 (1996):28-37.Kleopan Suwanarak และ Sermsiri Kongsaengdao. Competitive Effects between Purple Nutsedge (Cyperus rotundus Linn.) and Sugarcane. Department of Agriculture:ม.ป.ท. 1996.