You searched for: Subject Biotic communities Remove constraint Subject: Biotic communities Place Massachusetts Remove constraint Place: Massachusetts Place United States Remove constraint Place: United States Format Shapefile Remove constraint Format: Shapefile Year 2004 Remove constraint Year: 2004
2004. United States. Forest Service. This polygon shapefile is commonly called Bailey's ecoregions and shows ecosystems of regional extent in the United States, Puerto Rico, and the U.... National Atlas of the United States.