TY  - BOOK
AU  - CASS,MORTIN
TI  - THE VOR AND ADF / 
U1  - 629.13252 
PY  - 1991///
CY  - [S.N] : 
PB  - AIRLIFE PUBLISHING ، 
KW  - FLIGHTS
KW  - AIR PLANES
KW  - AIRCRAFT
ER  -