http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
Encyclopaedia of physical sciences and engineering information sources
Steven Wasserman, Martin A. Smith, and Susan Mottu, editors
A bibliographic guide to approximately 16000 citations for publications, organizations, and other sources of information on 425 subjects relating to the physical sciences and engineering