The federal government has a wealth of downloadable and printable maps available online. Sitting Bull College Library, as a member of the Federal Depository Library Program is your connection for sifting through the mass of government information online. A query by a visitor led to the following wealth of findings online. This version can be printed as a 24x36 wall map. While this one is downloadable as a pdf.
While this site includes both the map and index.
Additional tribal nations maps can be found on the www.data.gov site at this link.
