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Works Referenced

Agusta Aerospace Corp. Online. Internet. 6 June 1997. Available:
American Eurocopter. Online. Internet. 29 June 1997. Available:
Apostolo, Giorgio. The Illustrated Encyclopedia of Helicopters.
New York: Bonanza Books, 1984.
Bell Helicopter Textron, Inc. Online. Internet. 28 June 1997.
Boeing Co. Online. Internet. 4 Aug. 1997.
Concise Color Guides: Helicopters (1st ed.). (1993). Stamford: Longmeadow Press.
Helicopter Annual (15th ed.). (1997). Alexandria: Helicopter Association International.
"HFI Historic." Rotor Magazine. Vol. 4, No.3 -- Vol. 10, No.3.
Alexandria: Helicopter Association International.
Kaman Aerospace Corp. Online. Internet. 6 June 1997. Available:
Lambert, Mark. Jane's All the World's Aircraft. Surrey: Butler & Tanner Ltd., 1983.
Lightbody, Andy and Poyer, Joe. The Illustrated History of Helicopters.
Lincolnwood: Publications International Ltd., 1990.
McDonnell Douglas Helicopter Systems. Online Internet. 10 June 1997.
Available (before 1 Aug. 1997) at: http://www. ); available now:
Messenger, Charles. Helicopters. New York: Franklin Watts, 1985.
Morris, Charles L. Pioneering the Helicopter. Alexandria: Helicopter Association International, 1985.
Sikorsky Aircraft Corp. Online Internet. 12 June 1997.
Slattery, John. "HFI Archives." Helicopter Foundation International.
Sullivan, George. Modern Combat Helicopters. New York: Facts On File, Inc., 1993.
Taylor, M.J.H. Jane's Encyclopedia of Aviation. Volume 5. Danbury: Grolier Educational Corp., 1980.