Shahida Bibi, Abdul Rehman, Muhammad Hashim. SECURITY THREATS AND THE CONCENTRATION OF LEARNING ACTIVITIES IN CLASSROOMS OF BACHA KHAN UNIVERSITY STUDENTS CHARSADDA. PJER [Internet]. 2023 Sep. 30 [cited 2026 Apr. 25];6(3). Available from: https://pjer.org/index.php/pjer/article/view/905