Simple machines :
Adler, David A.
Simple machines : wheels, levers, and pulleys / Wheels, levers, and pulleys by David A. Adler ; illustrated by Anna Raff. - First edition. - 1 volume (unpaged) : color illustrations ; 29 cm
Ages 4-8. Grades K-3.
9780823433094 (hardcover)
2014026802
Simple machines--Juvenile literature.
TJ147 / .A4154 2014
621.8
Simple machines : wheels, levers, and pulleys / Wheels, levers, and pulleys by David A. Adler ; illustrated by Anna Raff. - First edition. - 1 volume (unpaged) : color illustrations ; 29 cm
Ages 4-8. Grades K-3.
9780823433094 (hardcover)
2014026802
Simple machines--Juvenile literature.
TJ147 / .A4154 2014
621.8