http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
a detailed investigation into the application of interval and relation theory to the problem of temporal database management
xxii, 422 pages : illustrations ; 24 cm.
C.J. Date, Hugh Darwen, Nikos A. Lorentzos.
Includes bibliographical references (pages 391-409) and index.