Aziagba, P. C., and U. H. Akpan. “Stock Utilisation Study Based On Use Of Call Mark In Nigerian Universities”. Journal of Research in Education and Society (JRES) 1, no. 1 (April 1, 2010): 97–113. Accessed September 19, 2024. http://icidr.org.ng/index.php/Jres/article/view/1116.