Vicko Andreas และ Ranjna Jindal. (2017) Spatial patterns of the heavy metals in the sediments at the Cha-Am municipality wastewater treatment ponds system. Mahidol University:ม.ป.ท.Vicko Andreas และ Ranjna Jindal. 2017. Spatial patterns of the heavy metals in the sediments at the Cha-Am municipality wastewater treatment ponds system. ม.ป.ท.:Mahidol University;Vicko Andreas และ Ranjna Jindal. Spatial patterns of the heavy metals in the sediments at the Cha-Am municipality wastewater treatment ponds system. ม.ป.ท.:Mahidol University, 2017. Print.