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br Karo, R.M. 2020. Determination of Radionuclide and Elemental Composition of Agricultural Soils From Sub District Tiga Panah, Karo, North Sumatera, Indonesia by X-ray Spectrometry . PRIMER (Prima Medical Journal). 5, 1 (Jul. 2020). DOI:https://doi.org/10.34012/pmj.v3i1.1112.