Khazaal, M.M. and Mohammed Shafiqu, Q.S. 2024. Using High-Density Polyethylene and Novolac Polymers to Improve the Properties of Gypseous Soil. Al-Nahrain Journal for Engineering Sciences. 27, 3 (Sep. 2024), 287–294. DOI:https://doi.org/10.29194/NJES.27030287.