1. The changing Midwest assessment: data and shapefiles
			
			
			- Author(s):
 - Potts, Robert S.; Gustafson, Eric J.; Stewart, Susan I.; Thompson, Frank R.; Bergen, Kathleen; Brown, Daniel G.; Hammer, Roger; Radeloff, Volker; Bengston, David; Sauer, John; Sturtevant, Brian
 
	U.S. Department of Agriculture