Naroumon Poomkhonsan และ Supasit Konyai. (2013) Land use and hydrologic soil group classification for the Yang River basin in Northeast Thailand. <i>KKU Engineering Journal</i>, <i>40</i>(4), 473-483.Naroumon Poomkhonsan และ Supasit Konyai. "Land use and hydrologic soil group classification for the Yang River basin in Northeast Thailand". KKU Engineering Journal 40 (2013):473-483.Naroumon Poomkhonsan และ Supasit Konyai. Land use and hydrologic soil group classification for the Yang River basin in Northeast Thailand. Faculty of Engineering, Khon Kaen Univeristy:ม.ป.ท. 2013.