Ashari, Arif. “GEOMORPHOLOGY OF THE SOUTHERN FLANK OF MERAPI VOLCANO IN RELATION TO THE POTENTIAL HAZARDS AND NATURAL RESOURCES: A REVIEW”. Geo Media: Majalah Ilmiah Dan Informasi Kegeografian, vol. 15, no. 2, May 2018, doi:10.21831/gm.v15i2.19556.