Glover, David. <br/><br/>
Screws / 
[by] David Glover. 
 - Crystal Lake, IL :  Rigby Interactive Library,  1997. 
 - 24 p. :  col. ill. ;  27 cm. 
 - Simple machines .
<br/><br/>Includes bibliographical references and index. 
<br/><br/> Introduces the principles of screws as simple machines, using examples from everyday life. 
<br/><br/><label>ISBN: </label>157572085X 
<br/><br/><label>LCCN: </label>96015800 /AC 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Screws--Juvenile literature.<br/>Screws.<br/>Simple machines.
<br/><br/><label>LC Class. No.: </label>TJ1338  / .G48 1997 
<br/><br/><label>Dewey Class. No.: </label>621.8/82