1. “Summary of 1972 Oil and Gas Statistics for Onshore and Offshore Areas of 151 Counties” Gov. survey Profit Paper 885, 163 pp., Stock No. 240102518, U.S. Government Printing Office, Washington, D.C.-1974
2. American Petroleum Institute: World Crude Oil Production by Countries, 1857-1967, in “Petroleum Facts and Figures”, Washington, 1971
3. Energy National Geographic, Special Report, February 1981, Washington, D.C.
4. Oil, Gas and the Challenge of the Arctic, American Petroleum Institute, 1220 L. Street Northwest, Washington, D.C. 20005
5. Dept. “Reserves of Crude Oil, Natural Gas Liquids, and Natural Gas in the United States and Canada, and the United Productivity Capacity as of December 31, 1972” published jointly by the American Gas Association Arlington, Va.; American Petroleum Institute, Washington, and Canadian Petroleum Association, Calgary, Alberta, Vol. 27
