La fortaleza de la calle cuatro
Subtitle: una historia acerca de seis máquinas simples
By: by Lois Spangler ; illustrated by Christina Wald
Contributors: Wald, Christina, illustrator
Publisher: Sylvan Dell Publishing
Published: 2013
Place of publication: Mt. Pleasant, SC
Language: spa
ISBN-13: 9781607187172; 9781607186564; 9781607186687; 9781607186205; 9781607186328; 9781607186441
Subjects: Building; Stories in rhyme; Grandfathers; Machinery; Spanish language materials; Simple machines; Fiction
Description: Building a fort in the backyard, a grandfather and granddaughter get help from six simple machines: lever, pulley, inclined plane, wheel and axle, screw, and wedge.