Abdurrahman, M., J. Gambo, I. G. Shitu, Y. A. Yusuf, Z. Dahiru, A. M. Idris, and A. A. Isah. “Solar Elevation Angle and Solar Culmination Determination Using Celestial Observation; A Case Study Of Hadejia Jigawa State, Nigeria”. International Journal of Advances in Scientific Research and Engineering (IJASRE), ISSN:2454-8006, DOI: 10.31695/IJASRE 5, no. 9 (September 12, 2019): 08–17. Accessed May 3, 2024. https://ijasre.net/index.php/ijasre/article/view/442.