Changnoi, Burin. 2014. “Online Geospatial Database and Processing of Universal Soil Loss Equation Modeling for Optimum Assessment of Soil Loss in Songkhram Sub-Watershed, Northeastern Thailand”. Agriculture and Natural Resources 48 (2). Bangkok, Thailand:241-53. https://li01.tci-thaijo.org/index.php/anres/article/view/243252.