Ladan, Suleiman Iguda. “THE RELEVANCE OF STUDYING ASTRONOMY IN ISLAMIC UNIVERSITIES OF NIGERIA WITH PARTICULAR REFERENCE TO AL-QALAM UNIVERSITY, KATSINA”. European Scientific Journal, ESJ 11, no. 5 (February 27, 2015). Accessed November 22, 2024. https://eujournal.org/index.php/esj/article/view/5176.