American Helicopter Society c1997

v. 1 , v. 2 , v. 3 : addendum

Available at 2 libraries

American Helicopter Society c1996

v. 1 , v. 2 , v. 3

Available at 1 libraries

American Institute of Aeronautics and Astronautics 1996

: set , pt. 1 , pt. 2 , pt. 3 , pt. 4

Available at 5 libraries

American Helicopter Society c1995

v. 1 , v. 2 , v. 3 : addendum

Available at 1 libraries

American Helicopter Society c1994

v. 1 , v. 2

Available at 1 libraries

American Helicopter Society c1992

v. 1 , v. 2

Available at 2 libraries

American Helicopter Society c1990

v. 1 , v. 2

Available at 2 libraries

American Helicopter Society [1985]

Available at 1 libraries

American Helicopter Society [1983]

Available at 1 libraries

American Helicopter Society 1981

Available at 1 libraries