Tantrakarnapa, K. and Wongsirikul, D. (2017) “The Behaviors and Perceptions of Migrants on Environmental Sanitation in Chiengrai Province: A Questionnaire Study”, Environment and Natural Resources Journal. Nakhon Pathom, Thailand, 6(2). available at: https://ph02.tci-thaijo.org/index.php/ennrj/article/view/83586 (accessed: 17 September 2026).