Palasan, Papatsara, Chutima Tassaro, and Nongnaphat Makchoochit. “The Effect of Using Instructional Set of Science Learning Subject Group on Topics of Environment and Local Natural Resources for Primary 6 Students, Schools in the Phupavaree Network Group, La-Ngu District Satun Province”. Princess of Naradhiwas University Journal of Humanities and Social Sciences 9, no. 2 (July 13, 2022): 18–38. Accessed April 27, 2024. https://so05.tci-thaijo.org/index.php/pnuhuso/article/view/254562.