Dave-Ugwu , P.O., Onah , A.E. and Chukwunwogor, E.O. (2020) “Open Textbook Adoption: Implication for Chemistry Education in Nigerian Secondary Schools”, West African Journal of Open and Flexible Learning, 9(1), pp. 25–40. Available at: https://wajofel.org/index.php/wajofel/article/view/61 (Accessed: 30 May 2026).