E. O, F.; O. S, B. Variations of time derivatives of the horizontal geomagnetic field and horizontal geomagnetic field along 96-degree magnetic meridian. Covenant Journal of Physical and Life Sciences, [S. l.], v. 4, n. 1, 2016. Disponível em: https://journals.covenantuniversity.edu.ng/index.php/cjpls/article/view/269. Acesso em: 25 apr. 2024.