Ruffin, Roy, <br/><br/>
Principles of economics / 
Roy J. Ruffin and Paul R. Gregory. 
 - 3rd ed. 
 - Glenview, Ill. :  Scott, Foresman,  c1988. 
 - xxxi, 918, [42] p. :  some col. ill. ;  27 cm.. 
<br/><br/>Includes bibliographies and index. 
<br/><br/><label>ISBN: </label>067318871X : 0673188833 (Marco volume) : 0673188825 (Micro volume) : 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Economics.
<br/><br/><label>Dewey Class. No.: </label>330 RUF