http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
Vols. 1-4 available on microfilm from University of Southern California Library Micrographics Dept.; v. 5- from University Microfilms International.
Issues for Dec. 2001- lack v. and issue numbering and called: 12.01-