00358nam a2200109Ia 450000500170000010000220001724501580003926000090019758300190020694200060022599900170023120260716043337.0  aGARAY, Luis Jorge  aProteccion, desgravacion preferencial y normas de origen en las Americas = Protection, preferential tariff reduction and rules of origin in the Americas.  c1996  c3/7/00kM2LMGR  cA  c45300d45300