TY  - BOOK
AU  - Sturm,Jeanne
TI  - GPS: : global positioning system 
T2  - Let's explore science
SN  - 9781604723304
U1  - 503 
PY  - 2011///
CY  - Florida
PB  - Rourke Publishing
KW  - Science
KW  - Juvenile literature
N1  - Includes index
ER  -