Khusna, N. I., Amin, S., & Sekarrini, C. E. (2020). The Effect of Using Biopore on Flood Reduction in District of Besuki, Tulungagung Regency. Sumatra Journal of Disaster, Geography and Geography Education, 4(1), 100–104. https://doi.org/10.24036/sjdgge.v4i1.316