TY  - BOOK
AU  - Barned,J.H.
TI  - Air Navigation
U1  -  629.132510942 
PY  - 1971///-
CY  - New Delhi
PB  - English Book Store
KW  - Air-pilot guides
KW  - England
KW  - Air traffic control
N1  - Glossary : p. 292-296; Includes index
ER  -