Ruffin, Roy, <br/><br/>
Principles of macroeconomics / 
Roy J. Ruffin, Paul R. Gregory. 
 - 3rd ed. 
 - Glenview, Ill. :  Scott, Foresman,  c1988. 
 - xxix, 512 p. :  ill. ;  26 cm. 
<br/><br/>Includes bibliographies and indexes. 
<br/><br/><label>ISBN: </label>0673188833 (pbk.) 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Macroeconomics.
<br/><br/><label>Dewey Class. No.: </label>339 RUF