http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
Encyclopedia of physical sciences and engineering information sources
a bibliographic guide to approximately 16,000 citations for publications, organizations, and other sources of information on 425 subjects relating to the physical sciences and engineering
Steven Wasserman, Martin A. Smith, and Susan Mottu, editors.