phengphit, narathip (2024) “The Development of a Drought Warning System using Geo-information Technology, Nakhon Sawan Province”, Burapha Science Journal. Chonburi, Thailand, 29(3 September-December), pp. 1097–1117. available at: https://li05.tci-thaijo.org/index.php/buuscij/article/view/565 (accessed: 4 June 2025).