TY  - BOOK
AU  - Kaplan, Elliott D.
AU  - Hegarty, Christopher
TI  - Understanding Gps Principles and Applications 
SN  - 1580538940
U1  - 629.045 
PY  - 2006///
CY  - Boston : 
PB  - Artech House, 
KW  - Global Positioning Systems
N1  - YY
UR  - https://eaklibrary.neduet.edu.pk:8443/catalog/bk/books/toc/1-58053-894-0.pdf
ER  -