TY  - BOOK
AU  - Good,Keith
TI  - Gear up!: marvelous machine projects
SN  - 0822535661 (lib. bdg. : alk. paper)
AV  - TJ 147 .G591 1999
PY  - 1999///
CY  - Minneapolis
PB  - Lerner Publications
KW  - Simple machines
KW  - Juvenile literature
N1  - Includes index
N2  - Introduces the workings of various kinds of simple machinery with moving parts, such as pulleys, levers, gears, cams, and conveyor belts and provides instructions for building these machines out of cardboard and other easily obtainable materials
ER  -