http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
National geochemical data base: PLUTO geochemical data base for the United States
PLUTO geochemical data base for the United States
Database contains inorganic geochemical data obtained by analytical laboratories of Geologic Division of USGS for the U.S. in support of USGS programs requiring such data.
by Philip A. Baedecker, Jeffrey N. Grossman, and Kim P. Buttleman.
System requirements: IBM or compatible pc; 640 KB RAM (at least 540 KB free); hard disk drive; MS or PC-DOS version 3.3 or later; VGA graphics card and color monitor; Microsoft MSCDEX version 2.1 or later; CD-ROM drive with ISO 9660 driver software; Microsoft-compatible mouse highly recommended.
U.S. Geological Survey digital data series ; DDS-47