Abdallah, Yousif Mohamed Y., Wail Zaki, Babeker Ahmadoun, and Abuobeada Musa. 2020. “Design of Reference Phantom for Quality Control of Conventional X-Ray Radiography Units in Port Sudan”. British Journal of Healthcare and Medical Research 7 (1):01-09. https://doi.org/10.14738/jbemi.71.7688.