Royston, Angela.

Levers / Angela Royston. - Chicago : Heinemann Library, c2001. - 32 p. : col. ill. ; 27 cm. - Machines in action .

Includes bibliographical references and index.

Explains how levers work, describes different machines that uses levers, and tells how to create an example of a lever in a pop-up card.

ISBN: 1575723190 (library)

LCCN: 00035002

Subjects--Topical Terms:
Simple machines.
Levers.

LC Class. No.: TJ147 / .R86 2001

Dewey Class. No.: 621.8/11