History of The Geysers Geothermal Field, produced by the California Department of Conservation, Division of Oil, Gas, and Geothermal Resources (1992)

Boston: Commonwealth of Massachusetts, Department of Conservation, Division of Fisheries and Game.

The Operation Fire Safe wildfire prevention program was begun in 1968 by the State of California Resources Agency, Department of Conservation, Division of Forestry, (CDF or CAL FIRE) in response to changing wildfire conditions resulting from more and more homes being built in rural areas that were formerly wildland.

California Department of Conservation, Division of Oil, Gas, and Geothermal Resources (DOGGR).

Rintoul, William, "Wood Derricks and Steel Men," Drilling Through Time, (Sacramento, California: California Department of Conservation, Division of Oil and Gas, 1990), pp.