Yasmuth, C., Panas-Ampol, K., Pongphot, B., Na BangXang, H., & Suchamnong, P. (2016). Coliforms in Drinking Water and Utensils of Restaurants in Chiang Mai. Journal of Associated Medical Sciences, 5(1), 17. Retrieved from https://he01.tci-thaijo.org/index.php/bulletinAMS/article/view/60694