By Popelka David   Sheffler Marc   Bilger Jim   in Journal of the American Helicopter Society

ISSN:2161-6027|32|2|21-33

AHS International‎(1987)‎

Access to resources Favorite 10.068237

By Popelka David   Lindsay David   Parham Tom   Berry Victor   Baker Donald J.   in Journal of the American Helicopter Society

ISSN:2161-6027|42|2|126-136

AHS International‎(1997)‎

Access to resources Favorite 6.7121577

By Nixon Mark W.   Piatak David J.   Corso Lawrence M.   Popelka David A.   in Journal of the American Helicopter Society

ISSN:2161-6027|45|4|270-279

AHS International‎(2000)‎

Access to resources Favorite 6.7121577