ESEKAK., MOKOBIAC., MOLUAC., and Ukpene A. O. “CHARACTERIZATION OF RADIOACTIVITY FROM PRIMORDIAL RADIONUCLIDES IN THE SOIL OF IKA SOUTH LOCAL GOVERNMENT AREA OF DELTA STATE”. FUDMA JOURNAL OF SCIENCES, Vol. 6, no. 2, May 2022, pp. 180 -84, doi:10.33003/fjs-2022-0602-913.