National Institute of Environmental Research;National Institute of Environmental Research;National Institute of Environmental Research;Korea Institute of Geoscience and Mineral Resources;National Institute of Environmental Research;National Institute of Environmental Research;National Institute of Environmental Research;National Institute of Environmental Research;National Institute of Environmental Research;
11. Almeida R.M.R., Lauia D.C., Ferreira A.C., and Sracek O., 2004, Groundwater radon, radium and uranium concentrations in Regiao dos Lagos, Rio de Janeiro State, Brazil., Journal of Environmental Radioactivity, 73, 323-334.
12. ANL (Argonne National Laboratory), 2005, radium Human Health Fact Sheet, August 205, ANL.
13. ASTM, 1997, D3454-05, Standard Test Method for Radium-226 in Water.
14. ASTM, 2000, D2460-97 Standard Test Method for Alpha-Particle-Emitting Isotopes of Radium in Water.
15. Cooper M. B. and Wilks M. J., 1981, An analytical method for Radium($^{226}Ra$) in environmental samples by the use of liquid scintillation counting, ARL/TR040, ISSN 0157-1400.
16. David S. Vinson, Avner Vengosh, Daniella Hirschfeld, Gary S. Dwyer., 2008, Relationships between radium and radon occurrence and hydrochemistry in fresh groundwater from fractured crystalline rocks, North Carolina (USA), Chemical Geology, 260, 159-171.
17. Bonotto, D.M., 2004, Doses from $^{226}Ra,\;^{226}Ra,\;and\;^{226}Ra$ in groundwater from Guarani aquifer, South America, Journal of Environmental Radioactivity, 76, 319-335.
18. Egidi P., 1997, Introduction to naturally occurring radioactive material, 42nd Annual Meeting of the Health Physics Society, p. 48.
19. Standard Method, 21st Edition, 2005, SM7500-Ra B, C, D, E.
20. USEPA, 1980, Method 903.1 Radium-226 in Drinking Water (Radon Emanation Technique).
21. USEPA, 1980, Method 904.0 Prescribed procedures for measurement of radioactivity in drinking water.
22. USEPA, 2000, National Primary Drinking Water Regulation; Radionuclides; Final Rule.
23. USEPA, 2009, National Primary Drinking Water Regulation MCL Booklet.
24. William C. Burnett, and Wei Chieh. Tai, 1992, Determination of Radium in natural Waters by cy Liquid Scintillation, Anal. Chem, 64, 1691-1697.
25. Zapecza O.S. and Szabo Z., 1986, A physiologically based assessment of human exposure to radon released from groundwater, Chemosphere, 54, 639-645.