OBIDIMMA, O. A.; OSUAFOR, A. M. EFFECTS OF USE OF IMPROVISED CONSUMABLE CHEMICAL SUBSTANCES IN INSTRUCTIONAL DELIVERY ON SECONDARY SCHOOL STUDENTS’ ACHIEVEMENT IN CHEMISTRY. UNIZIK Journal of STM Education, [S. l.], v. 3, n. 1, p. 192–207, 2019. Disponível em: https://journals.unizik.edu.ng/jstme/article/view/499. Acesso em: 3 may. 2024.