Abdul Hakam, Junaidi, Bayu M Adji, and Shafira Rahmadilla Hape. 2019. “WEST SUMATRA COASTLINE CHANGE DUE TO ABRASION PROTECTION STRUCTURES: PADANG BEACH”. GEOMATE Journal 16 (57):170-75. https://geomatejournal.com/geomate/article/view/2864.