Eduardo, Kevin. “ANALYSIS OF THE GALODO FLOOD DISASTER FROM YEAR 1979 AND YEAR 2009 PASIE LAWEH, BATUSANGKAR”. SEMESTA: Journal of Science Education and Teaching 3, no. 2 (December 14, 2020): 85–92. Accessed November 5, 2024. https://semesta.ppj.unp.ac.id/index.php/semesta/article/view/117.