228Ra/226Ra activity ratio in groundwater around Mount Fuji, JapanTomoko Ohta, Yasunori Mahara, Kimio Miyakawa, Takumi Kubota, Keiko Tagami and Jun SatoEPJ Web of Conferences, 24 (2012) 03003DOI: https://doi.org/10.1051/epjconf/20122403003
