Abdul Hakam, JulitaAndriniRepadi, Fathol Bari, Junaidi, Febrin Anas Ismail, and Andriani. “SLIP SURFACE IN A CLAY-SAND MIXTURE SLOPE TEST USING SCALED LABORATORY MODELS”. GEOMATE Journal, vol. 21, no. 85, Sept. 2021, pp. 17-23, https://geomatejournal.com/geomate/article/view/60.