The lever
By: words by Harlan Wade ; concept and ill. by Denis Wrigley.
Contributors: Wrigley, Denis.
Edition: Rev. ed.
Series: His A book about
Publisher: Raintree Children Books
Published: 1979
Place of publication: Milwaukee
Language: eng
Number of pages: 32
Subjects: Levers -- Juvenile literature.; Levers.
Description: A simple explanation of how a lever works.