Thinkamchoet, J., and Wongchantra, P. “The development of camp on natural resources and environmental sonservation in the ASEAN for youths in Roi-et province”. International Journal of Agricultural Technology 14, no. 7 (December 15, 2018): 2077–2096. accessed September 23, 2026. https://li04.tci-thaijo.org/index.php/IJAT/article/view/10307.