Rosa, G., Ferreira, A. de O., Rodriguez, D. G., & Bastos, R. O. (2021). Determination of the activity concentration of 226Ra, 232Th, 40K and the concentration of 222Rn in soil samples of the Campos Gerais region (ParanĂ¡). Brazilian Journal of Radiation Sciences, 9(1A). https://doi.org/10.15392/bjrs.v9i1A.1240