TY  - BOOK
AU  - Moore, Rob,
CN  - QC178
CN  - QC178
CY  - New York :
DA  - 2010.
ID  - 342241
KW  - Gravity
KW  - Mass (Physics)
KW  - Gravity.
N1  - Includes index.
PB  - PowerKids Press,
PP  - New York :
PY  - 2010.
SN  - 9781615318896
SN  - 1615318895
SN  - 9781615319107 (pbk.)
SN  - 1615319107 (pbk.)
T1  - Why do balls bounce? :all about gravity /
TI  - Why do balls bounce? :all about gravity /
ER  -