Hartono, Gendoet, Adjat Sudrajat, and Ildrem Syafri. “Gumuk Gunung Api Purba Bawah Laut Di Tawangsari - Jomboran, Sukoharjo - Wonogiri, Jawa Tengah”. Indonesian Journal on Geoscience 3, no. 1 (March 28, 2008): 37–48. Accessed March 14, 2025. https://ijog.geologi.esdm.go.id/index.php/IJOG/article/view/46.