Ruffin, Roy J. <br/><br/>
Principles of economics 

 - 5th ed. 
 - New York, N.Y. :  Harper Collins College,  1993 
 - 850 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Economics
<br/><br/><label>LC Class. No.: </label>HB171.5  / R833P 1993