TY - BOOK AU - Murphy,Patricia J. TI - Push and pull SN - 0516225510 AV - QC73.4 .M87 2002 U1 - 531/.6 21 PY - 2002/// CY - New York PB - Scholastic KW - Force and energy KW - Juvenile literature N1 - N ; 570 ; Lexile ; N ; Raz-Plus N2 - Simple text and photographs describe and illustrate push and pull movement ER -