By Alwang J. Roger   in Journal of the American Helicopter Society

ISSN:2161-6027|27|2|21-26

AHS International‎(1982)‎

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By Alwang J. Roger   Skarvan Charles A.   in Journal of the American Helicopter Society

ISSN:2161-6027|22|3|13-18

AHS International‎(1977)‎

Access to resources Favorite 4.035847