TY  - ADVS
AU  - Czerski,Helen
AU  - Humble,Kate
ED  - BBC Worldwide Ltd.
TI  - Orbit: earth's extraordinary journey 
SN  - 5051561035425
PY  - 2012///
CY  - New York, N.Y.
PB  - BBC Worldwide Ltd.
KW  - Artificial satellites
KW  - Orbits
KW  - Astronomy
KW  - Earth movements
KW  - Solar system
KW  - Earth (Planet)
ER  -