TY  - BOOK
AU  - Murphy, Patricia J. 
TI  - Up and down
T2  - Rookie read about science 
SN  - 9780516225531
AV  - QC133.5  
U1  - 531.113  
PY  - 2002///
CY  - Children Press : 
PB  - New York, 
KW  - Gravity
KW  - Motion
KW  - Physics
N1  - G
; 380
; Lexile
; G
; Raz-Plus

N2  - A simple introduction to up and down movement

ER  -