Developing a Spatial Framework of Common Ecological Regions for the Conterminous US Developing-a-Spatial-Framework-of-Common-Ecological-Regions-for-the-Conterminous-United-States_McMahon-et-al-2001.pdf Document Type / Category Published Article Document Collection AIM Science Subject Geospatial and Mapping Ecology Vegetation Management and Plant Science Hydrology and Water Resources Popular Scientific Literature Soil Science