Seenukhroah, Adcharee. 2024. “Radiation Dose under Lead Block in Split Field Irradiation Using Cobalt - 60 Machine”. Maharat Nakhon Ratchasima Hospital Journal 31 (2). Nakhon Ratchasima,Thailand:105-12. https://he04.tci-thaijo.org/index.php/MNRHJ/article/view/1981.