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, [S. l.], v. 11, n. 5, 2015. Disponível em: https://test.eujournal.org/index.php/esj/article/view/5176. Acesso em: 16 apr. 2025.