Rabiu, A. B., R. B. Abdulrahim, O. A. Garuba, O. O. Adekanmbi, S. A. Alabi, L. L. Ojurongbe, and A. S. Lawani. 2019. “Occurrence of Similar Periods in Geomagnetic Field Variations and Solar Activity”. ARID ZONE JOURNAL OF ENGINEERING, TECHNOLOGY AND ENVIRONMENT 15 (SPi2), 223-41. https://www.azojete.com.ng/index.php/azojete/article/view/31.