TY  - BOOK
AU  - Evans,David
TI  - Let's explore science : Make it balance
T2  - Let's explore science
SN  - 9781564581181
PY  - 1992///
CY  - New York 
PB  - Dorling Kindersley
KW  - Equilibrium
KW  - Experiments
N2  - nvestigates, through simple experiments, the basic principles of balance and explores the concepts of gravity, mass, force, and weight
ER  -