TY  - BOOK
AU  - Logsdon, Tom,
TI  - Understanding the Navstar 
SN  - 0442020546 (hc)
U1  - 623.893 LOG 
PY  - 1995///
CY  - New York 
PB  - Van Nostrand Reinhold
KW  - Global Positioning System.;Artificial satellites in navigation
ER  -