Hartono, Hill. Gendoet, and Setyo Pambudi. “Gunung Api Purba Mujil, Kulonprogo, Yogyakarta: Suatu Bukti Dan Pemikiran”. ReTII00 (January 15, 2017). Accessed April 28, 2024. //journal.itny.ac.id/index.php/ReTII/article/view/261.