TY  - BOOK
AU  - Sonnenberg, C J
AU  - 
TI  - Radar and electronic navigation
U1  - 527:621.396.96 
PY  - 1978///
CY  - London
PB  - Newnes-Butterworths
KW  - Navigation
KW  - Nautical astronomy
KW  - Aeronautical astronomy
ER  -