Ruffin,Roy J. <br/><br/>
Principles of macroeconomics 
/ Roy J.Ruffin, Paul R.Gregory 
. - Dallas  : Scott, 1983
. - xxix-416 p.  ; 26 cm. 
<br/><br/>index 
<br/><br/><label>ISBN: </label>067315856X 
<br/><br/><label>Source: </label> don de l'ABBAD 
<br/><br/><label>Universal Decimal Class. No.: </label>330.