Mamo TR, Nigussa G. The Practices and Challenges of Internal School Supervision: The Case in East Wollega Secondary Schools. IJSSES [Internet]. 2019 Mar. 1 [cited 2026 Jun. 13];5(3):178-91. Available from: https://www.ijsses.tiu.edu.iq/index.php/ijsses/article/view/570