By Gates Charles A.   Piziali Raymond A.   DuWaldt Frank A.   in Journal of the American Helicopter Society

ISSN:2161-6027|8|2|14-27

AHS International‎(1963)‎

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By Daughaday Hamilton   DuWaldt Frank   Gates Charles   in Journal of the American Helicopter Society

ISSN:2161-6027|2|3|27-45

AHS International‎(1957)‎

Access to resources Favorite 7.602479