1. US Department of Energy. Crude oil production and oil well productivity, 1954-2000 (Table 5.2), 2001. Retrieved from Department of Energy Data and Prices Reports Online via DOE Access: http://www.eia.doe.gov/emeu/aer/txt/tab0502.htm
2. Laval K. Exemption loss cuts gasohol flow. The Oklahoma, 1983. Retrieved April 14, 2003 from http://archives.oklahoman.com
3. Tallent B. New rule requires alcohol label. The Oklahoman, 1982. Retrieved from http://achives.oklahoman.com
4. Deering FJ. Gasohol can’t compete as auto fuel. The Oklahoman, 1984. Retrieved from http://archives.oklahoman.com
5. Oklahoma House Bill 1217. Engrossed, 48 OK. Leg. section 2-F 6,7, 2001.