Th. Al-Hadidi, Maysam, and Atheer G. Ibrahim. “Improvement of Gypsum Soil by Using Polyurethane to Reduce Erosion and Solubility of Irrigation Canals”. International Journal of Engineering & Technology 7, no. 4.20 (November 28, 2018): 372–376. Accessed May 6, 2024. https://sciencepubco.com/index.php/ijet/article/view/26137.