Nursandah, F. et al. 2021. The Effect of Addition of Stone Ash to Shear Strength of Clay Soil in Suruh Trenggalek. Civilla : Jurnal Teknik Sipil Universitas Islam Lamongan. 6, 1 (Mar. 2021), 1–14. DOI:https://doi.org/10.30736/cvl.v6i1.545.