http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
American statistics index ... annual and retrospective edition
"A comprehensive guide and index to the statistical publications of the U.S. government."
"Attempts to cover all statistical publications currently in print, as well as most significant publications issued since the early 1960's".--p. x.