By Peters David A.   He Cheng Jian   in Journal of the American Helicopter Society

ISSN:2161-6027|36|3|59-70

AHS International‎(1991)‎

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By Peters David A.   Boyd David Doug   He Cheng Jian   in Journal of the American Helicopter Society

ISSN:2161-6027|34|4|5-17

AHS International‎(1989)‎

Access to resources Favorite 9.673803

By Choi Keeyoung   He ChengJian   Du Val Ronald W.   in Journal of the American Helicopter Society

ISSN:2161-6027|44|1|42-49

AHS International‎(1999)‎

Access to resources Favorite 2.6096125