Gemanam SJ, Egwuchi BO, Sombo T, Agba EH, Daniel T. MEASUREMENT OF GAMMA RADIATION EMISSION FROM NATURALLY OCCURRING RADIOACTIVE SAMPLES OF USHONGO GEOLOGICAL ROCKS, NORTH CENTRAL NIGERIA. NJP. 2022;31(2):47-51. Accessed August 21, 2025. https://njp.nipngr.org/index.php/njp/article/view/58