By Bouwer Gerhard   Hilbert Kathryn B.   in Journal of the American Helicopter Society

ISSN:2161-6027|31|2|27-32

AHS International‎(1986)‎

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By Landis Kenneth H.   Dunford Philip J.   Aiken Edwin W.   Hilbert Kathryn B.   in Journal of the American Helicopter Society

ISSN:2161-6027|30|2|3-13

AHS International‎(1985)‎

Access to resources Favorite 9.206542