Burnie, David. <br/><br/>
Machines and how they work / 
written by David Burnie. 
 - 1st American ed. 
 - New York :  Dorling Kindersley,  1991. 
 - 64 p. :  col. ill. ;  29 cm. 
 - See & explore library .
<br/><br/> Accelerated Reader  School Library Journal  Wilson's Children's Catalog  Wilson's Junior High Catalog 
<br/><br/> An introduction to simple and complex machines. 
<br/><br/> 7.2  4-7 
<br/><br/><label>ISBN: </label>1879431157  $15.75 
<br/><br/><label>LCCN: </label>91060147  
<br/><br/><label>Subjects--Topical Terms: </label><br/>Simple machines--Juvenile literature.<br/>Simple machines.<br/>Machines.<br/>Machinery
<br/><br/><label>LC Class. No.: </label>TJ147 
<br/><br/><label>Dewey Class. No.: </label>621.8