Sookchaiya, Thammanoon, Thawin Matung, and Sithichai kulsri. 2023. “The Design and Development of Relative Humidity Control Systems for Negative Pressure Airborne Infectious Isolation Room”. Institute of Vocational Education Southern Region 3 Journal (KRIS Journal) 3 (2). Songkhla, Thailand:95-108. https://so08.tci-thaijo.org/index.php/KRIS/article/view/3297.