Samanmit P, Vongphet J, Sittichok K, Khawkomol S, Bhattrawuhichai S. Drought Analysis via the Use of Standardized Precipitation Evapotranspiration Index (SPEI): A Case Study of the Eastern Economic Corridor . Sci. & Eng. Connect [internet]. 2023 Sep. 30 [cited 2025 Jun. 30];46(3):239-52. available from: https://ph04.tci-thaijo.org/index.php/SEC/article/view/10171