Tankaew, Pallop, Phanita Komolmal, Jongkon Jainoonwong, Proawpilart Intayot, and Bongkotwan Sutabhaha. “Exploration of Microorganisms in Hospital Operating Room, University Classroom and Meeting Room by Modified Sampling Collector Compared to Open Dish Method”. Journal of Associated Medical Sciences 42, no. 1 (January 1, 2009): 25. Accessed May 19, 2024. https://he01.tci-thaijo.org/index.php/bulletinAMS/article/view/60093.