Ihsan, H.M, M.P. Hadi, and J. Sartohadi. “Step-Wise Overlay Technique for the Mapping of Unconfined Groundwater Potential Zone in Tectonically Controlled Landforms”. International Journal of Geoinformatics 16, no. 4 (December 1, 2020): 20–28. Accessed April 30, 2026. https://ijg.e-geoinfo.com/index.php/journal/article/view/1791.