Khamvanh Phengnaone และผู้แต่งคนอื่นๆ. (2020) 2D electrical resistivity tomography (ERT) methodto delineate coal seams: Case studies on lignite and anthracite. <i>Songklanakarin Journal of Science and Technology</i>, <i>42</i>(4), 844-849.Khamvanh Phengnaone และผู้แต่งคนอื่นๆ. "2D electrical resistivity tomography (ERT) methodto delineate coal seams: Case studies on lignite and anthracite". Songklanakarin Journal of Science and Technology 42 (2020):844-849.Khamvanh Phengnaone และผู้แต่งคนอื่นๆ. 2D electrical resistivity tomography (ERT) methodto delineate coal seams: Case studies on lignite and anthracite. Research and Development Office, Prince of Songkla University:ม.ป.ท. 2020.