Clayton, Gary E. <br/><br/>
Economics: Principles and practices 

 - New York:  Glencoe McGraw-Hill Companies,  1999. 
 - xiv, 626p.  ill. some col. 
<br/><br/> includes index 
<br/><br/><label>ISBN: </label>0028235568 0028235606 
<br/><br/><label>Dewey Class. No.: </label>330