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Federal
Tribal Land Boundary Polygons, R6 and R9 U.S.-Mexico Border Region, 2021, U.S. Environmental Protection Agency recent views
U.S. Environmental Protection Agency —
This polygon feature class contains the boundaries of tribes in the U.S. - Mexico Border region used by U.S. EPA Region 6 (R6) and U.S. EPA Region 9 (R9) for the...