AZIAGBA, P. C.; AKPAN, U. H. Stock Utilisation Study Based On Use Of Call Mark In Nigerian Universities. Journal of Research in Education and Society (JRES) , [S. l.], v. 1, n. 1, p. 97–113, 2010. Disponível em: http://icidr.org.ng/index.php/Jres/article/view/1116. Acesso em: 19 sep. 2024.