http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
1 computer laser optical disk ; 4 3/4 in.
Contains digital data for all 1990 census map features (such as roads, railroads, and rivers), feature names and classification codes, alternate feature names, the associated 1980 and 1990 census geographic area codes and FIPS (Federal Information Processing Standard) codes.
System requirements: Computer system capable of using CD-ROM drive; 640K; application software, if IBM compatible personal computer, requires also CD-ROM software, such as Microsoft Extensions (version 2.0 or highter); CD-ROM drive.