Wongkaew, S. (1997) “Application of Weathering Process Phenomena Modify Decomposed shale to be Used as Core-Zone Material in an Earth Filled Dam”, Agriculture and Natural Resources. Bangkok, Thailand, 31(2), pp. 212–217. available at: https://li01.tci-thaijo.org/index.php/anres/article/view/240821 (accessed: 17 September 2026).