http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
vol 1: Its relation to us; revised by Paul E. Smith -- vol 2: How we adapt ourselves to it; revised by Paul E. Smith -- vol 3: hHow we use and control it; revisd by Gordon E. van Hooft.
[by] Harry A. Carpenter [and] George C. Wood.