TY  - BOOK
AU  - Beath John
AU  -  Katsoulacos Yannis
TI  - Economic theory of product differentiation
SN  - 0521335264
U1  - X:511, N1 
PY  - 1991///
CY  - Cambridge
PB  - Cambridge University Press        
KW  - Marketing Survey
N1  - Bibliography : p 194-99
ER  -