TY  - GEN
AU  - Murphy, Patricia J.
TI  - Up and down
T2  - Rookie Read-About Science
SN  - 0516225537
CY  - USA
KW  - Motion
KW  - Gravity
KW  - Non-Fiction
KW  - Kindergarten's Literature
N2  - A simple introduction to up and down movement
ER  -