Sharp, Elizabeth N. <br/><br/>
Simple machines and how they work / 
by Elizabeth N. Sharp ; illustrated by Ida Scheib 
 - New York :  Random House,  1959 
 - 83 p. :  ill. ;  24 cm. 
<br/><br/> Includes index 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Simple machines--Juvenile literature
<br/><br/><label>Dewey Class. No.: </label>621