RUFFIN, Roy J. Gregort, Paul R. <br/><br/>
Principles of economics 
[by] Roy J.Ruffin, Paul R.Gregort 
 - Illinois  Scott, Foresman  1983 
 - xxxii, 798 p. 
<br/><br/> Includes index. 
<br/><br/><label>ISBN: </label>673155080 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Economics
<br/><br/><label>Dewey Class. No.: </label>330  / RUF