Manullang, F.P. et al. 2023. Characterization of Meteorological Drought Using Standardized Precipitation Index and Standardized Precipitation Evapotranspiration Index Methods in North Sumatera. Prisma Sains : Jurnal Pengkajian Ilmu dan Pembelajaran Matematika dan IPA IKIP Mataram. 11, 4 (Oct. 2023), 1084–1101. DOI:https://doi.org/10.33394/j-ps.v11i4.9961.