br Karo, R. M. “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), vol. 5, no. 1, July 2020, doi:10.34012/pmj.v3i1.1112.