Weiss, Harvey. <br/><br/>
Machines and how they work / 
Harvey Weiss. 
 - 1st ed. 
 - New York :  Crowell,  c1983. 
 - 80 p. :  ill ;  24 cm. 
<br/><br/> Booklist. 
<br/><br/> An introduction to six simple machines--the lever, the inclined plane, the screw, the wheel and axle, the wedge, and the pulley--and their use in more complex machines such as derricks, bulldozers, and metal lathes. 
<br/><br/> 5.2  Follett Library Book Co.  5.2  Follett Library Resources.  5-8.  5-8  Follett Library Resources. 
<br/><br/><label>ISBN: </label>069004299X :  $10.95 0690043007 (lib. bdg.) :  $10.89 
<br/><br/><label>LCCN: </label>82045925 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Gearing--Juvenile literature.<br/>Levers--Juvenile literature.<br/>Pulleys--Juvenile literature.<br/>Simple machines--Juvenile literature.<br/>Simple machines.<br/>Machinery.
<br/><br/><label>LC Class. No.: </label>TJ147  / .W428 1983 
<br/><br/><label>Dewey Class. No.: </label>621.8