This image was acquired from
wikimedia. It was marked as Public Domain or CC0 and is free to use. To verify, go to the source and check the information there.
Keywords from Image Description:
Census Bureau Czechs in the United States. ethnographic map en June en Sreejithk CommonsHelper Stevey en PDUSGovDOCCensus Stevey Original upload log page en Czech Stevey bytes no PDUSGovDOCCensus Population density maps of the United States Maps of ethnic groups in the United States United States Census Bureau Maps