By Dunham John   Marlow Michael L.   in Applied Economics

ISSN:1466-4283|35|18|1935-1942

Routledge Ltd‎(2003)‎

Access to resources Favorite 9.822492

By Watson William R.   Dunham John R.   in Journal of the American Helicopter Society

ISSN:2161-6027|13|3|1-19

AHS International‎(1968)‎

Access to resources Favorite 8.311317