By Lebacqz J. Victor   Forrest Raymond D.   in Journal of the American Helicopter Society

ISSN:2161-6027|27|1|35-41

AHS International‎(1982)‎

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By Lebacqz J. Victor   Chen Robert T. N.   Gerdes Ronald M.   Weber Jeanine M.   in Journal of the American Helicopter Society

ISSN:2161-6027|28|3|63-70

AHS International‎(1983)‎

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