URL dokumen:
https://prisma.simaster.ugm.ac.id/karya_files/the-characteristic-of-impacted-soil-by-the-merapi-eruption-in-plawangan-hill-of-taman-nasional-gunung-merapi--yogyakarta--indonesia-dcfcd07e645d245babe887e5e2daa016/c8940bc9-b025-11ee-abf0-e4434b0aade8
