Hariyanto, Teguh, and Hepi Hapsari Handayani. 2011. “VALUASI UMLAH REA AN EBARAN EMBURAN UMPUR I ILAYAH ENCANA UMPUR ORONG IDOARJO ENGAN ITRA ATELIT ULTITEMPORAL”. EOID 7 (1):7-12. https://doi.org/10.12962/geoid.v7i1.1322.