Abdulazeez, N., J. L. Ogbanje, and M. S. Zakari. “Evaluation of Annual Effective Dose of Radon-222 Concentrations in Ground Water from Kotorkoshi and Its Rocky Environs, Zamfara State, Nigeria”. Direct Research Journal of Engineering and Information Technology 13, no. 1 (March 21, 2025): 38–43. Accessed May 31, 2026. https://journals.directresearchpublisher.org/index.php/drjeit/article/view/309.