Hargis, Dean (January 26, 2000). "California Offshore Oil and Gas Energy Resources Study"(PDF). California Department of Conservation. Minerals Management Service, U.S. Department of the Interior. Archived from the original(PDF) on July 6, 2010. Retrieved December 30, 2009.
Hargis, Dean (January 26, 2000). "California Offshore Oil and Gas Energy Resources Study"(PDF). California Department of Conservation. Minerals Management Service, U.S. Department of the Interior. Archived from the original(PDF) on July 6, 2010. Retrieved December 30, 2009.