Tantrakarnapa, Kraichat, and Danaya Wongsirikul. “The Behaviors and Perceptions of Migrants on Environmental Sanitation in Chiengrai Province: A Questionnaire Study”. Environment and Natural Resources Journal 6, no. 2 (April 19, 2017). Accessed May 5, 2024. https://ph02.tci-thaijo.org/index.php/ennrj/article/view/83586.