Evaluation of radon, radium and gamma radiation at the environmental preservation area of Passaúna river, Brazil. Braz. J. Radiat. Sci. [Internet]. 30 de abril de 2021 [citado 16 de julio de 2025];9(1A). Disponible en: https://bjrs.org.br/revista/index.php/REVISTA/article/view/1525