00291nam a2200109Ia 450000500170000008000180001710000290003524500390006426000400010330000190014358300190016220260716043542.0  a09.05.08 T782  aTravis, William Penfield  aThe theory of trade and protection  bHarvard Univ. P.aCambridgeUSc1964  ax, [3], 296 p.  c11/19/04kJOYD