James D. Hamilton, "Historical Oil Shocks." Prepared for Handbook of Major Events in Economic History, December 22, 2010. University of California, San Diego. Available here.
web.archive.org
"2008 Report of the state oil & gas supervisor"(PDF). Department of Oil, Gas, and Geothermal Resources. California Department of Conservation ("DOGGR 2009"). 2009. Archived from the original(PDF) on 2017-05-25. Retrieved April 26, 2010. p. 63.
Thanawala, Sudhin. "Calif. Town Is Nation's Smoggiest", Associated Press. [1]Archived 2007-09-28 at the Wayback Machine
wilmingtonstar.com
Thanawala, Sudhin. "Calif. Town Is Nation's Smoggiest", Associated Press. [1]Archived 2007-09-28 at the Wayback Machine