Meesang, Winai, and Navapat Navakakam. “TYPE AND QUANTITY OF BACTERIA IN AIR FROM THE MAIN SERVICE ACTIVITIES IN THE OFFICE, CASE STUDY: FACULTY OF SCIENCE’S OFFICE UDON THANI RAJAHAT UNIVERSITY, SAM PHRAO CAMPUS”. Research Journal Phranakhon Rajabhat : Science and Technology 17, no. 1 (June 27, 2022): 1–9. accessed September 10, 2026. https://li01.tci-thaijo.org/index.php/PRRJ_Scitech/article/view/251447.