กรมอนามัย ก. Volume 4 Number 1 January - June 1999. Thai Dental Public Health Journal, Bangkok, Thailand, v. 4, n. 1, p. 1–85, 1999. Disponível em: https://he02.tci-thaijo.org/index.php/ThDPHJo/article/view/213971. Acesso em: 19 sep. 2026.