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2. Oil and Gas In 1983, Shell Briefing Service No. 2, 1984, Shell International Petroleum Company Limited (PA/012), London
3. Springborn, Harold W., “The Story Of Natural Gas Energy,” American Gas Association, 1515 Wilson Blvd., Arlington, VA. 22209
BIBLIOGRAPHY:
1. American Petroleum Institute. “Oil, Gas and The Challenge Of The Arctic”; 1220 L Street Northwest, Washington, D.C. 20005.
2. Canfield, John and Backman, David. “World Resources Oil”; Wayland Publishers Limited, Priory Press Limited, 49 Landowne Place, Howe, Sussex.
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8. Springborn, Harold W. “The Story Of Natural Gas Energy”; American Gas Association, 1515 Wilson Blvd., Arlington, VA 22209, 1980.
9. The Natural Gasbook; American Gas Association; 1515 Wilson Blvd., Arlington, VA 22209, 1984.