PRISM Climate Group. United States. Agricultural Research Service. cartographic Maps. lcgft [Washington, DC] : U.S. Dept. of Agriculture, Agricultural Research Service ; [Corvallis] : Oregon State University, [2012] eng Shows "Average annual extreme minimum temperature 1976-2005" in both fahrenheit and celcius degrees. Includes insets of Alaska, Hawaii, and Puerto Rico. Plants--Hardiness--United States--Maps. Acclimatization (Plants)--United States--Maps. Vegetation and climate--United States--Maps. Climatic extremes--United States--Maps. Temperature forecasting, Minimum--United States--Maps. United States. Available also through the Library of Congress Web site as a raster image. http://hdl.loc.gov/loc.gmd/g3701d.ct003970