La palanca
By: adaptación al español por Mamie M. Contreras ; escrito por Harlan Wade ; conceptos e ilus. por Denis Wrigley.
Contributors: Wade, Harlan.; Wrigley, Denis.
Series: Her Un libro sobre
Publisher: Raintree Childrens Books
Published: 1979
Place of publication: Milwaukee
Language: spa
Number of pages: 32
Subjects: Levers -- Juvenile literature.; Levers.; Spanish language materials.
Description: A simple explanation of how a lever works.
Notes: Adaptation of The lever.