1993. Hull, Dennis N. Includes legend, text, location maps and primary data source maps. compiled by Dennis N. Hull. Scale 1:250,000 Depths shown by bathymetric isolines. Ohio. Division of Geological Survey.
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1993. Goldthwait, Richard P. 1911-1992. Includes legend, text, location maps and primary data source maps. compiled by Richard P. Goldthwait and Robert G. Van Horn. Scale 1:250,000 Depths... Ohio. Division of Geological Survey.
13. Regional bedrock geology of the Ohio portion of the Piqua, Ohio-Indiana 30 x 60 minute quadrangle
1993. Schumacher, Gregory A. Includes bibliographical references. Adhesive "Revision" label affixed at end of bibliography. by Gregory A. Schumacher ; Lisa Van Doren and Michae... Ohio. Division of Geological Survey.
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.).