Manullang FP, Tarigan K, Situmorang M, Humaidi S, Doloksaribu DED, Darmawan Y. Characterization of Meteorological Drought Using Standardized Precipitation Index and Standardized Precipitation Evapotranspiration Index Methods in North Sumatera. J. Prisma. Sains [Internet]. 2023 Oct. 30 [cited 2025 Aug. 16];11(4):1084-101. Available from: https://e-journal3.undikma.ac.id/index.php/prismasains/article/view/9961