Lukjan, Arun, Arsit Iyaruk, and Chumnong Petchprakob. 2020. “Soil water retention curve and permeability function of the para rubber biopolymer treated sand”. Interdisciplinary Research Review 15 (5):1-7. https://ph02.tci-thaijo.org/index.php/jtir/article/view/241025.