TY  - BOOK
AU  - Shackleton,Caroline
AU  - Paul,Nathan
TI  - Up in the air: our fight against gravity 
T2  - Cambridge discovery interactive readers
SN  - 9781107634701 (pbk. : alk. paper)
PY  - 2013///
CY  - New York
PB  - Cambridge University Press
KW  - Gravity
KW  - Juvenile literature
KW  - English language
KW  - Textbooks for foreign speakers
KW  - Readers (Elementary)
ER  -