UsmanY.T., JibrinA.Y., IshaqY., BelloS. and YahayaM.A. 2022. ASSESSMENT OF NATURAL IONIZING RADIATION IN TWO TERTIARY INSTITUTIONS OF NIGER STATE. FUDMA JOURNAL OF SCIENCES. 5, 4 (Jan. 2022), 161 - 188. DOI:https://doi.org/10.33003/fjs-2021-0504-800.