Woods Michael  1946 <br/><br/>
Ancient machines :  from wedges to waterwheels / 
by  Michael Woods and Mary B. Woods. 
 - Minneapolis :  Runestone Press,  c2000. 
 - 88 p. :  col. ill. ;  23 cm. 
 - Ancient technology .
<br/><br/>Includes bibliographical references (p. 85) and index. 
<br/><br/> Discusses the invention of six simple machines in various ancient civilizations from the Stone Age to the fall of the Roman Empire. 
<br/><br/><label>ISBN: </label>0822529947 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Simple machines--Juvenile literature<br/>Machinery--History--Juvenile literature<br/>Simple machines<br/>Machinery--History
<br/><br/><label>LC Class. No.: </label>TJ147 
<br/><br/><label>Dewey Class. No.: </label>621.8