Beaver, John B. <br/><br/>
Simple machines / 
by John B. Beaver and Barbara R. Sandall. 
 - [S.l.] :  Mark Twain, Inc., Publishers,  2002. 
 - 78 p. : ;  ill.;.  28 cm. : 
 - Teacher Resource & Student Activity Book. .
 - Teacher Resource & Student Activity Book. .
<br/><br/>Includes bibliographical references. 
<br/><br/> 5-8+ Grades. 
<br/><br/><label>ISBN: </label>1580372120 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Science--Activity books.
<br/><br/><label>Subjects--Geographic Terms: </label><br/>Simple Machines.
<br/><br/><label>Dewey Class. No.: </label>621.8