Guide to Geologic Hazards in Alaska - Glossary
- Radon gas
- A radioactive, gaseous isotope of radon; it is a member of the thorium series and a daughter of radium-224. (Neuendorf, K.K.E. and others, 2005)
- DGGS online catalog of government agency publications relating to: Radon gas
- University of Alaska, Fairbanks, Cooperative Extension Service: Publications catalog
- U.S. Environmental Protection Agency (EPA): Radon homepage
- Idaho State University, physics department (ISU): Facts concerning environmental radon