LAONGPLIU, C. LEARNING ACTIVITY PACKAGE FOR PM2.5 LITERACY AND PREVENTION OF EARLY ELEMENTARY STUDENTS IN BORDER SCHOOLS, RATCHABURI PROVINCE. Journal of Liberal Art of Rajamangala University of Technology Suvarnabhumi, [S. l.], v. 8, n. 2, p. 316–328, 2026. Disponível em: https://so03.tci-thaijo.org/index.php/art/article/view/299410. Acesso em: 12 oct. 2026.