1988. National Atlas of the United States. This map layer portrays 1988 estimates for total personal income, per capita personal income, annual number of full-time and part-time jobs, averag... National Atlas of the United States.
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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.