Guo, Q., Shimo, M., Ikebe, Y. and Minato, S. (1992) The Study of Thoron and Radon Progeny Concentrations in Dwellings in Japan. Radiation Protection Dosimetery, 45, 357-359.
 IAEA (2003) Radiation Protection against Radon in Workplaces Other than Mines. International Atomic Energy Agency, Vienna, 3-8.
 National Research Council (1999) Risk Assessment of Radon in Drinking Water. Committee on Risk Assessment of Exposure to Radon in Drinking Water, National Research Council, 296-298.
 Kadhem, Z.G. (2012) Concentration of Radioactivity with Uranium, Radon Gas and Concentrations of Some Heavy Metals in Soil at Al-Nasiriyah City. M.Sc. Thesis, Thi-Qar University, Nasiriyah.
 Khan, A.J., Varshney, A.K., Prasad, R., Tyagi, R.K. and Ramachandran, T.V. (1990) Calibration of a CR-39 Plastic Track Detector for the Measurement of Radon and Its Daughters in Dwellings. Nuclear Tracks and Radiation Measurements, 17, 497-502.
 Amalds, O., Custball, N.H. and Nielsen, G.A. (1989) Cs137 in Montarq Soils. Health Physics, 57, 955-958.
 Durrani, S.A. and Bull, R.K. (1987) Solid State Nuclear Track Detection: Principles, Methods and Applications. Pergammon Press, UK.
 Alam, M.N., Chowdhry, M.I., Kamal, M., Ghose, S., Islam, M.N. and Awaruddin, M. (1999) Radiological Assessment of Drinking Water of the Chittagong Region of Bangladesh. Radiation Protection Dosimetry, 82, 207-214.
 UNSCEAR (2000) United Nations Scientific Committee on the Effects of Atomic Radiation: Sources and Effects of Ionizing Radiation. United Nations, New York.
 Ferreira, A.O., Pecequilo, B.R. and Aquino, R.R. (2011) Application of a Sealed Can Technique and CR-39 Detectors for Measuring Radon Emanation from Undamaged Granitic Ornamental Building Materials. Radioprotection Journal, 46, 49-54.
 Kant, K., Upadhyay, S.B. and Chakarvarti, S.K. (2005) Alpha Activity in Indian Thermal Springs. Iranian Journal of Radiation Research, 2, 197-204.
 USEPA (2012) Report Drinking Water Standards and Health Advisories. USEPA.
 Environmental Protection Agency (EPA) (2000) Regulations, Final Rule for Non-Radon Radionuclides in Tap Water, Technical Fact Sheet. EPA, 815-F-00-013.