TY  - BOOK
AU  - W.K KILFORD
TI  - ELEMENTARY  AIR SURVEY
U1  - 629.13/KIL/ELE 
PY  - 1970///
CY  - London 
PB  - THE ENGLISH LANGUAGE BOOK SOCIETY AND CASSELL
KW  - ENGINEERING
KW  - OTHER BRANCHES OF ENGINEERING
ER  -