1. Thermal history of the Karapiti area, Wairakei;Allis;N.Z. Geophys. Div. Rep.,1979
2. Radon Detection using Track Registration Material;Alter;U.S. Patent 3,665,194,1972
3. Radon in the New Zealand geothermal regions;Belin;Geochim. Cosmochim. Acta,1959
4. Ground radon survey of a geothermal area in Hawaii;Cox;Geophys. Res. Lett.,1980
5. Investigation of radon and helium as possible fluid-phase precursors to earthquakes;Craig;Scripps Inst. Oceanogr. Rep.,1976