Mirna Apriani, Ali Masduqi, and Wahyono Hadi. “INVESTIGATION ON CALCIUM AND MAGNESIUM IN TRADITIONAL SALT PLOTS: PROMOTING UTILIZATION WASTE BY-PRODUCT”. GEOMATE Journal, vol. 15, no. 49, Mar. 2018, pp. 130-6, https://geomatejournal.com/geomate/article/view/966.