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MapThree-dimensional geologic framework model for a karst aquifer system, Hasty and Western Grove quadrangles, northern Arkansas Catalog Record - Electronic Resource Available System requirements for Windows: Pentium III, 500 MHz; 256 MB memory; 20 GB disk; Any 16 MB Video Card for graphics; Windows 2000. System requirements for Linux: Pentium II, 400 MHz; 256 MB memory; 20 GB disk; Any 8 MB Video Card for graphics. Includes bibliographical references. Also available in via Internet.- Contributor: United States. National Park Service - Geological Survey (U.S.) - Turner, Kenzie J.
- Date: 2007
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MapAn historical geography of the United States, Also available in digital form.- Contributor: Maccoun, Townsend
- Date: 1911
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