Kamolchanok Panishkan และผู้แต่งคนอื่นๆ. (2010) Soil Classification Based on their Chemical Composition Using Principal Component Analysis. <i>EnvironmentAsia</i>, <i>3</i>(1), p47-52.Kamolchanok Panishkan และผู้แต่งคนอื่นๆ. "Soil Classification Based on their Chemical Composition Using Principal Component Analysis". EnvironmentAsia 3 (2010):p47-52.Kamolchanok Panishkan และผู้แต่งคนอื่นๆ. Soil Classification Based on their Chemical Composition Using Principal Component Analysis. Thai Society of Higher Education Institutes on Environment:ม.ป.ท. 2010.