TY  - BOOK
AU  - Dowling,John
TI  - RAF helicopters : : the first twenty years
SN  - 0117727253 ; 9780117727250
U1  - 623.746047 23
PY  - 1992///
CY  - London : 
PB  - HMSO , 
KW  - Helicopters ; Military helicopters. ; Royal air force. ; Great Britain
N1  - Includes indexes
ER  -