Edora, Angelo, and Mary Ann Q. Adajar. “STRENGTH AND PERMEABILITY CHARACTERISTICS OF EXPANSIVE SOIL WITH GYPSUM AND RICE HUSK ASH”. GEOMATE Journal 21, no. 88 (December 30, 2021): 28–34. Accessed January 24, 2022. https://geomatejournal.com/geomate/article/view/1272.