Diana, G.O. and Wildian, W. 2019. Rancang Bangun Sistem Pendeteksian Dini Tanah Longsor Berbasis SMS. Jurnal Fisika Unand. 8, 1 (Jan. 2019), 20–25. DOI:https://doi.org/10.25077/jfu.8.1.20-25.2019.