TY  - BOOK
AU  - Graham,Ian
AU  - Khan,Aziz
ED  - Ron Hayward Associates.
TI  - How it works / Helicopters
SN  - 1573355410
PY  - 1993///
CY  - New York
PB  - Shooting Star Press
KW  - Helicopters
N2  - An introduction to the characteristics and uses of different types of helicopters
ER  -