Roongrawee Kingsawat และ Raywadee Roachanakanan. (2011) Accumulation and distribution of some heavy metals in water, soil and rice fields along the Pradu and Phi Lok canals, Samut Songkhram province, Thailand. <i>Environment and Natural Resources Journal</i>, <i>9</i>(1), 38.Roongrawee Kingsawat และ Raywadee Roachanakanan. "Accumulation and distribution of some heavy metals in water, soil and rice fields along the Pradu and Phi Lok canals, Samut Songkhram province, Thailand". Environment and Natural Resources Journal 9 (2011):38.Roongrawee Kingsawat และ Raywadee Roachanakanan. Accumulation and distribution of some heavy metals in water, soil and rice fields along the Pradu and Phi Lok canals, Samut Songkhram province, Thailand. คณะสิ่งแวดล้อมและทรัพยากรศาสตร์:ม.ป.ท. 2011.