Ruffin, Roy J. <br/><br/>
Principles of economics / 
Roy J. Ruffin,and Paul R.Gregory 
 - Illinois :  Scott, Foresman and Co. ,  1983 
 - xxxi, 798p. :  ill. ;  26 cm. 
<br/><br/>Includes bibliographical references and index. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Economic theory<br/>International monetary system
<br/><br/><label>Dewey Class. No.: </label>330.1  / RUF-2