00273nam a2200109Ia 450000500170000008000180001710000220003524500370005726000340009430000160012858300190014420260716043542.0  a09.05.08 J672  aJohnson, Harry G.  aAspects of the theory of tariffs  bAllen & UnwinaLondonGBc1971  axii, 451 p.  c11/19/04kJOYD