Dr. Abdal Azeam Osman Qamar-KL.Deen, & Dr. Abdallah Mahmoud Abdal.Majed. (2014). Mathematics Subject Supervision. Its Significance. Problems. and Solutions from the Teachers Viewpoints. White Nile Journal for Studies and Research, (4), 159–184. Retrieved from https://journals.wnu.edu.sd/index.php/wnjsr/article/view/228