TY  - BOOK
AU  - Kaplan,Elliott
AU  - Hegarty,Christopher J.
TI  - Understanding GPS: principles and applications 
T2  - Artech House mobile communications series
SN  - 9781580538947
AV  - G109.5  .U52 2006
PY  - 2006///
CY  - London
PB  - Artech House
KW  - Global Positioning System
ER  -