Nursanti, Ida, and Khairani Khairani. “The Implementation of School Disaster Preparedness Policy (SSB) In SMPN 2 North Rao District Pasaman”. Sumatra Journal of Disaster, Geography and Geography Education, vol. 2, no. 1, June 2018, pp. 42-49, doi:10.24036/sjdgge.v2i1.120.