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1、 https:crsreports.congress.gov Updated January 3, 2022Costa Rica: An OverviewCosta Rica historically has been an outpost。

2、CRS Report for CongressPrepared for Members and Committees of Congress Costa Rica: Background and U.S. Relations name re。

3、Congressional Research Service The Library of CongressCRS Report for CongressReceived through the CRS WebOrder Code RS21。

4、Order Code IB85102 U,S, FOREIGN ASSISTkZCE FACTS UPDATED 033187 Zonathan E. Sanford rs and National Def2nse Division ess。