Maosew, Kanchaya, and Jaruntorn Boonyanuphap. 2022. “Analysis of Land Use Change, Root Causes and Potential Impacts of the Lower Num Samun Sub-Watershed of Nan Province”. Thai Journal of Forestry 33 (2). Bangkok, Thailand:131-48. https://li01.tci-thaijo.org/index.php/tjf/article/view/255447.