Waradet SANGBUN และ Songvoot SANGCHAN. (2015) AN ANALYSIS OF GROUNDWATER LEVELS AND GROUNDWATER FLOW DISTRIBUTIONS IN LOWER NAMKAM RIVER, THAILAND. Thai Society of Agricultural Engineering:ม.ป.ท.Waradet SANGBUN และ Songvoot SANGCHAN. 2015. AN ANALYSIS OF GROUNDWATER LEVELS AND GROUNDWATER FLOW DISTRIBUTIONS IN LOWER NAMKAM RIVER, THAILAND. ม.ป.ท.:Thai Society of Agricultural Engineering;Waradet SANGBUN และ Songvoot SANGCHAN. AN ANALYSIS OF GROUNDWATER LEVELS AND GROUNDWATER FLOW DISTRIBUTIONS IN LOWER NAMKAM RIVER, THAILAND. ม.ป.ท.:Thai Society of Agricultural Engineering, 2015. Print.