Umpawa, Tussaporn, Utumma Maghanemi, and Kwanchai Ratanasthien. “Production of Tissue Equivalent Phantom for Radiographic Exposure Technique Chart Establishment”. Journal of Associated Medical Sciences 33, no. 1 (February 16, 2015): 20. Accessed May 18, 2024. https://he01.tci-thaijo.org/index.php/bulletinAMS/article/view/60295.