Rusman, .-., A. Rohman, and I. Abdulhak. “Curriculum Development Training Improvement in the Competence Geological Disaster Mitigation Community Based”. International Research Journal of Engineering, IT & Scientific Research, vol. 3, no. 2, Mar. 2017, pp. 19-33, https://sloap.org/journals/index.php/irjeis/article/view/528.