Tập tin:Minneapolis Fed map.pngof the following images: File:Map_of_USA_with_county_outlines_(black_&_white).png licensed with Cc-by-sa-3.0-migrated-with-disclaimers, GFDL-en 2006-09-25T09:34:33Z
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Tập tin:Boston Fed map.pngof the following images: File:Map_of_USA_with_county_outlines_(black_&_white).png licensed with Cc-by-sa-3.0-migrated-with-disclaimers, GFDL-en 2006-09-25T09:34:33Z
Tập tin:Plurality Black counties.pngI, the copyright holder of this work, hereby publish it under the following licenses: This file is licensed under the Creative Commons Attribution-Share