Hamdi Razeg, Khalid, خالد, Kareem D. Alazawi, کریم, Mahmood Ahmed Hmood, and محمود. 1970. “Structural and Electrical Properties of the High Temperature Superconducting System Bi2Ba2Ca2Cu3O10+δ”. Journal of Education and Science (JES) 24 (4):114-22. https://doi.org/10.33899/edusj.1970.58952.