TY  - BOOK
AU  - Kaplan, Elliott D.
AU  - Hegarty, C.
TI  - Understanding GPS : : principles and applications 
SN  - 9780890067932 (hbk)
U1  - 623.893 
PY  - 1996///
CY  -  Boston
PB  - Artech House, 
KW  - Global Positioning System
N1  - Includes index
ER  -