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1. United States Volcanoes, 2008

2005. Smithsonian Institution, Global Volcanism Program, National Atlas of the United States, and the United States Geological Survey and ESRI. United States Volcanoes is a polygon theme representing volcanoes thought to be active in the last 10,000 years (Holocene), in and near the United ... ESRI.

2. U.S. Hospitals 2008

2005. Health Forum, L.L.C. U.S. Hospitals represents the locations and selected attributes for hospitals included in the FY2005 edition of the American Hospital Association (... ESRI.

3. U.S. National Atlas Volcanoes 2008

2005. Smithsonian Institution, Global Volcanism Program, National Atlas of the United States, and the United States Geological Survey. U.S. National Atlas Volcanoes represents volcanoes thought to be active in the last 10,000 years (Holocene), in and near the United States. The dat... ESRI.