Usman, Yusuf Tanko, A. Y. Jibrin, Y. Ishaq, S. Bello, and M. A. Yahaya. 2022. “ASSESSMENT OF NATURAL IONIZING RADIATION IN TWO TERTIARY INSTITUTIONS OF NIGER STATE”. FUDMA JOURNAL OF SCIENCES 5 (4), 161 -88. https://doi.org/10.33003/fjs-2021-0504-800.