Amacher, Ryan C. <br/><br/>
Principles of economics / 
Ryan C. Amacher, Holley, H. Ulbrich. 
 - 4th ed. 
 - Cincinnati :  South-Western,  c1989. 
 - xvi, 555 p. :  ill. ;  26 cm. 
<br/><br/> Includes Index. 
<br/><br/>Includes bibliographical references. 
<br/><br/><label>ISBN: </label>0538800747 (pbk.) 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Economics.