Beath, John. <br/><br/>
The economic theory of product differentiation / 
John Beath and Yannis Katsoulacos. 
 - Cambridge :  Cambridge University Press,  1991. 
 - ix, 204 p. :  ill. ;  23 cm. 
<br/><br/> Includes index. 
<br/><br/>Includes bibliographical references:  p. 194-199. 
<br/><br/><label>ISBN: </label>0521335523 (pbk.) 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Product differentiation.