Olatunji TI, Adewumi Adebisi T. Comparative Analysis of Operational Structures in Single- and Dual-Mode Distance Learning Institutions in Nigeria. IRRODL [Internet]. 2021 Mar. 11 [cited 2024 Nov. 24];22(1):59-77. Available from: https://www.irrodl.org/index.php/irrodl/article/view/5120