TY - JOUR AU - Kurnianto, Fahmi Arif PY - 2020/12/31 TI - Front-matter JF - Geosfera Indonesia; Vol 5 No 3 (2020): GEOSFERA INDONESIADO - 10.19184/geosi.v5i3.21713 KW - N2 - UR - https://jurnal.unej.ac.id/index.php/GEOSI/article/view/21713