By Milgram Judah H.   Chopra Inderjit   in Journal of the American Helicopter Society

ISSN:2161-6027|39|4|46-58

AHS International‎(1994)‎

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By Milgram Judah   Chopra Inderjit   Straub Friedrich   in Journal of the American Helicopter Society

ISSN:2161-6027|43|4|319-332

AHS International‎(1998)‎

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