Obidimma, O. A. and Osuafor, A. M. (2019) “EFFECTS OF USE OF IMPROVISED CONSUMABLE CHEMICAL SUBSTANCES IN INSTRUCTIONAL DELIVERY ON SECONDARY SCHOOL STUDENTS’ ACHIEVEMENT IN CHEMISTRY”, UNIZIK Journal of STM Education, 3(1), pp. 192–207. Available at: https://journals.unizik.edu.ng/jstme/article/view/499 (Accessed: 3 July 2024).