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Author: Bielawa Richard L.
Publisher: AHS International
ISSN: 2161-6027
Source: Journal of the American Helicopter Society, Vol.22, Iss.4, 1977-10, pp. : 2-9
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By Alexander Harold R. Hengen Lois M. Weiberg James A.
Journal of the American Helicopter Society, Vol. 20, Iss. 2, 1975-04 ,pp. :