Nadia Batool Nehal, Farida Azim Lodhi. AN INVESTIGATIVE STUDY ON THE VALIDITY & RELIABILITY OF FRANCHISE SCHOOLING SYSTEMS IN KARACHI. PJER [Internet]. 2022 Dec. 30 [cited 2026 Aug. 27];5(4). Available from: http://www.pjer.org/index.php/pjer/article/view/708