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References
- ↑ Taylor 1965, p. 95.
- Apostolo, Giorgio. The Illustrated Encyclopedia of Helicopters. New York: Bonanza Books, 1984. Pg.123 ISBN 0-517-439352.
- Taylor, John W. R. (1965). Jane's All The World's Aircraft 1965–66. London: Sampson Low, Marston & Co., Ltd.
- The Illustrated Encyclopedia of Aircraft (Part Work 1982-1985). Orbis Publishing.
