Ruffin, Roy. J.  1938- <br/><br/>
Principles of microeconomics. / 
Roy J. Ruffin, Paul R. Gregory. 
 - Dallas Texas, :  Scott, Foresman and company,  1983. 
 - 484 p. :  il. ;  26 cm. 
<br/><br/> Includes glossary 
<br/><br/><label>ISBN: </label>0673158578 
<br/><br/><label>Dewey Class. No.: </label>xxx  / xxx