Toobudda, S., & Sripokangkul, A. P. D. S. S. (2018). Guideline for the Development of Chang-Kra Wild Orchid Park Wat Pa Manchakhiri, Manchakhiri District, Khon Kaen Province as the Ecotourism Site. Journal of Research and Development Institute Rajabhat Maha Sarakham University, 5(2), 241–252. Retrieved from https://so03.tci-thaijo.org/index.php/rdirmu/article/view/210517