00375nam a2200121Ia 4500008004100000020001500041082001900056100001600075245005400091260005000145300002700195700003100222250402b        |||||||| |||| 00| 0 eng d  a0521335523  a338.5bB369.ET  aBeath, John  aThe economic theory of product differentiationb/  aCambridge:bCambridge University Press,c1991  aix, 204p. Bibl. Index.  aKatsoulacos, Yanniseauth.