http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
Includes gravity data for entire state of Nevada and adjacent parts of California, Utah, and Arizona. About 80,000 gravity stations were compiled primarily from National Geophysical Data Center and USGS. Data files are in Portable Document Format (PDF), and disc also contains installers for Adobe Acrobat readers for Window and Macintosh.
Also available via Internet from the USGS web site. Address as of 7/31/02: http://wrgis.wr.usgs.gov/dds/dds-42; current access is available via PURL.
System requirements for Macintosh: Macintosh computer; 8MB RAM; System 7; 13-inch color monitor; CD-ROM drive.
System requirements for Windows: IBM or compatible PC (386 or higher processor); 8MB RAM; MS- or PC DOS version 5.0 or later; Microsoft Windows 3.1 or higher; VGA color monitor; CD-ROM drive.
U.S. Geological Survey digital data series ; DDS-42