^Berry, G.W.; Grim, P.J.; Ikelman, J.A. (1980). Thermal springs list for the United States (Report). Key to Geophysical Records Documentation No. 12. Environmental Data and Information Service National Geophysical and Solar-Terrestrial Data Center. Boulder, Colo.: U.S. Department of Commerce, National Oceanic and Atmospheric Administration (NOAA). p. 14. doi:10.2172/6737326.
^ abHiggins, Chris T.; Therberge, Albert E. Jr.; Ikelman, Joy A. (1980). Geothermal Resources of California(PDF) (Map). NOAA National Geophysical Center. Sacramento: California Department of Mines and Geology.