KURNIAWAN, A S, and H G HARTONO. “Identifikasi Awal Keberadaan Gunung Api Purba Di Daerah Sejati, Giriwoyo, Wonogiri, Jawa Tengah”. ReTII00 (January 15, 2017). Accessed December 5, 2024. //journal.itny.ac.id/index.php/ReTII/article/view/253.