B. M. AbdElrahman Saeed 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)”, J. Tikrit U Hum., vol. 29, no. 5, pp. 370–393, May 2022.