@misc{oai:repo.qst.go.jp:00069128,
 author = {Yoshinaga, Shinji and Ishikawa, Tetsuo and Tokonami, Shinji and et.al and 吉永 信治 and 石川 徹夫 and 床次 眞司},
 month = {Oct},
 note = {8th Internation Symposium on the Natural Radiation Environment},
 title = {Radon in drinking water and cancer mortality: an ecological study in Japan},
 year = {2007}
}