TY  - BOOK
AU  - Sonnenberg,G.J.
TI  - Radar and electronic navigation / : G. J. Sonnenberg. 
SN  - 0408011912
U1  - 623.8933 23
PY  - 1988///.
CY  - London : 
PB  - Butterworths, 
KW  - Electronics in navigation.
KW  - Radar in navigation.
KW  - Satellite.
ER  -