TY  - BOOK
AU  - Sorensen,Elias
TI  - Global positioning systems
T2  - Space science, exploration and policies
SN  - 9781607410126
PY  - 2010///
CY  - New York
PB  - Nova Science Pub.
KW  - Global Positioning System
N1  - Includes bibliographical references and index
ER  -