TY  - BOOK
AU  - Tetley,L.
AU  - Calcutt,D.M.
TI  - Electronic navigation systems / 
SN  - 0750651385
U1  - 623.8504 23
PY  - 2001///.
CY  - Oxford ; , Boston : 
PB  - Butterworth-Heinemann, 
KW  - Electronics in navigation.
ER  -