NEW YORK (Standard&Poor's CreditWire) Sept. 22, 1999--Standard&Poor's today assigned its triple-'A' rating to Series A of the Republic of Argentina's Serial Zero Coupon Notes with Rolling International Bank for Reconstruction&Development (IBRD or World Bank) Guarantee due October 2000, and its triple-'B' rating to Series B due April 2001, Series C due October 2001, Series D due October 2002, Series E due October 2003, and Series F due October 2004. The face value of each series is US$250 million. The triple-'A' rating on the Series A notes reflects the full and timely guarantee of the triple-'A' rated World Bank. The triple-'B' ratings on the subsequent series reflect the World Bank's guarantee of the payment of