@misc{oai:repo.qst.go.jp:00069141,
 author = {Sorimachi, Atsuyuki and Tokonami, Shinji and Ishikawa, Tetsuo and Takahashi, Hiroyuki and Miyahara, Nobuyuki and 反町 篤行 and 床次 眞司 and 石川 徹夫 and 宮原 信幸},
 month = {Oct},
 note = {8th international symposium on the natural radiation environment},
 title = {The Japanese radon and thoron reference chambers},
 year = {2007}
}