Chai-udom, Kwanchai, and Sompong Suwannatong. 2023. “Application of Geographic Information System for Magnolia sirindhorniae Noot.& Chalermglin Forest Database Lopburi province”. Journal of Science and Technology CRRU 2 (1). Chiangrai, Thailand:22-33. https://li01.tci-thaijo.org/index.php/jstcrru/article/view/257843.