Yahya DO, Adebola ST. Availability of Activities and Appropriateness of Graphical Illustrations in Recommended Economics Textbooks for Senior Secondary School Students in Ogun State, Nigeria. theijhss [Internet]. 2019 Apr. 30 [cited 2024 Jul. 22];7(4). Available from: https://internationaljournalcorner.com/index.php/theijhss/article/view/144557