AbdElrahman Saeed, B. M., and M. M. Ahmed Mustafa. “The Role of Training Courses in Aquiring Skills of Using Educational Aids A Field Study on the Teachers of the Basic Stage in Al-Hasahisa Administrative Unit, Gezira State, Sudan (2021)”. Journal of Tikrit University for Humanities, vol. 29, no. 5, May 2022, pp. 370-93, doi:10.25130/jtuh.29.5.2022.18.