1993. National Geographic Society (U.S.). Cartographic Division. Includes tex and chronological chart. Includes text, ancillary maps of "Ice age vegetation 18,000 years BP" and "Greenhouse-effect vegetation zones... Washington, D.C. : National Geographic Society, 1993.
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1993. Smithsonian Institution, Global Volcanism Program, National Atlas of the United States, and the United States Geological Survey, Harvard Geospatial Library, and Environmental Systems Research Institute, Inc. (ESRI). U.S. National Atlas Volcanoes represents volcanoes thought to be active in the last 10,000 years, in and near the United States. Environmental Systems Research Institute, Inc. (ESRI).
1993. 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, in and near the United States. Environmental Systems Research Institute, Inc. (ESRI).
1993. 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, in and near the United States. Environmental Systems Research Institute, Inc. (ESRI).
1993. Environmental Systems Research Institute (Redlands, Calif.). This point shapefile represents the locations of the major cities (with populations) of the world at a scale of 1:15,000,000. This layer is part of... Environmental Systems Research Institute (Redlands, Calif.).
1993. Environmental Systems Research Institute (Redlands, Calif.) and National Geographic Society (U.S.). This polygon shapefile contains generalized boundaries for the countries of the world and population statistics at 1:50,000,000 scale. This layer i... Environmental Systems Research Institute (Redlands, Calif.).
1993. Esri. World Countries (Generalized) represents generalized boundaries for the countries of the world. Esri.
1993. Environmental Systems Research Institute (Redlands, Calif.). World Gazetteer represents the locations and proper names for map features around the world. The gazetteer includes attribute and annotation name i... Environmental Systems Research Institute (Redlands, Calif.).