By Brady W. Gordon   Ludwig Gary   in Journal of the American Helicopter Society

ISSN:2161-6027|8|2|1-13

AHS International‎(1963)‎

Access to resources Favorite 9.840694

By Homicz Gregory F.   Ludwig Gary R.   in INTER-NOISE and NOISE-CON Congress and Conference Proceedings

ISSN:0736-2935|1983|1|197-206

Institute of Noise Control Engineering‎(1983)‎

Access to resources Favorite 8.3266945