DAVE-UGWU , P. O.; ONAH , A. E.; CHUKWUNWOGOR, E. O. Open Textbook Adoption: Implication for Chemistry Education in Nigerian Secondary Schools. West African Journal of Open and Flexible Learning, [S. l.], v. 9, n. 1, p. 25–40, 2020. Disponível em: https://wajofel.org/index.php/wajofel/article/view/61. Acesso em: 29 mar. 2024.