TY  - BOOK
AU  - Hofmann-Wellenhof, B.; Lichtenegger, H.  & Collins, J.
TI  - Global positioning system : theory and practice .-5th rev ed .-978-81-8128-751-9
SN  - 978-81-8128-751-9
U1  - 623.893 Hof 
PY  - 2001///
CY  - Springer, New Delhi
ER  -