TY  - BOOK
AU  - Ardley,Neil
TI  - The Science Book of Gravity
SN  - 0-15-200621-4
PY  - 1992///
CY  - New York
PB  - Harcourt Brace Jovanovich
KW  - Gravity - Experiments
KW  - Experiments
N2  - Simple experiments demonstrate the laws of gravity
ER  -