Tangtham, N. . and Korporn, A. (1998) “P-Factors in Universal Soil Loss Equation (USLE) of Various Conservation Practices on Hillslope at Mae Sa Integrated Watershed and Forest Land-use Project, Changwat Chiang Mai”, Agriculture and Natural Resources. Bangkok, Thailand, 32(1), pp. 41–51. available at: https://li01.tci-thaijo.org/index.php/anres/article/view/240554 (accessed: 14 April 2025).