TANTIWUTTHIPONG, S.; MEKSANGSOUY, P. .; SITHI, A. . Application of Geographic Information System to Allocate Service Areas of the Rural Road Sub-district: A Case Study of Ratchaburi Rural Road District. Journal of Letters, [S. l.], v. 50, n. 1, p. 136–156, 2021. Disponível em: https://so03.tci-thaijo.org/index.php/jletters/article/view/245805. Acesso em: 6 feb. 2023.