1. Simple soil mass balance approach to interpret the distribution of global terrestrial gamma ray dose rates in relation to geology
2. Terrestrial Gamma Ray Dose Rates in Andesitic Terrains
3. 3)Ikeda, T., RESL Rep. SCS-0054(2009), http://www3.starcat.ne.jp/~reslnote/(in Japanese)
4. 4)Minato, S., J. Geogr., 115, 87-96(2006)(in Japanese)
5. 5)Ito, M., Ishioka, S., Ishida, N., Enomoto, A., Ohtake, H., Okamura, E., Kasai, S., Ogashiwa, S., Hosoda, M. and Fukushi, M., Tokyo J. Radiol. Technol., 100, 84-85(2006)(in Japanese)