2004. National Atlas of the United States. This polygon shapefile portrays county level data for the fiscal-year-2004 National Fire Plan - Hazardous Fuels Reduction Program. The purpose of t... National Atlas of the United States.
1974. U.S. Geological Survey. This data set contains 1970-1994 cancer mortality information for counties in the United States. Included are death rates, number of deaths, confi... U.S. Geological Survey.
1988. U.S. Geological Survey. This map layer contains mortality information for United States Health Service Areas (805 groups of counties). Included are mortality rates by sex... U.S. Geological Survey.