Glover, David, 1953 Sept. 4-
Pulleys and gears /
David Glover.
- Crystal Lake, IL : Rigby Interactive Library, c1997.
- 24 p. : ill. (chiefly col.) ; 27 cm.
- Simple machines .
- Glover, David, 1953 Sept. 4- Simple machines. .
Includes bibliographical references (p. 24) and index.
Introduces the principles of pulleys and gears as simple machines, using examples from everyday life.
1575720841 (lib. bdg.)
96015815 /AC
Pulleys.
Gearing.
TJ147 / .G57 1997
621.8/11