Asere, Adeola Margaret and Sedara, Samuel Omosule 2020. Determination of Natural Radioactivity Concentration and Radiogenic Heat Production in Selected Quarry Sites in Ondo State, Nigeria. NIPES - Journal of Science and Technology Research. 2, 3 (Aug. 2020). DOI:https://doi.org/10.37933/nipes/2.3.2020.26.