Bronto, Sutikno, P. Asmoro, G. Hartono, and Sulistiyono Sulistiyono. 2012. “Evolution of Rajabasa Volcano in Kalianda Area and Its Vicinity, South Lampung Regency”. Indonesian Journal on Geoscience 7 (1):11-25. https://doi.org/10.17014/ijog.7.1.11-25.