By Nay Harvey O.   Sullivan Robert J.   in Journal of the American Helicopter Society

ISSN:2161-6027|8|1|26-30

AHS International‎(1963)‎

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By Amer Kenneth B.   Sullivan Robert J.   Eakin Jerry D.   in Journal of the American Helicopter Society

ISSN:2161-6027|9|4|3-12

AHS International‎(1964)‎

Access to resources Favorite 7.5547338