http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
Provides comprehensive long-term mineral statistics on production, consumption, and trade of 34 mineral commodities, arrayed by commodity and state, for the years 1970-1990. Statistics have been compiled from the Minerals yearbook, and represent official federal government mineral statistics.
System requirements: IBM PC or compatible; 386 or better microprocessor; 640K RAM (2 megabytes extended or expanded memory); MS-DOS 3.3 or higher; Lotus 1-2-3 (version 3.1+) required to access . WK1 files; monitor (retrieval software will support several types); CD-ROM drive.