http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
v. 1. Origin and foundation, 1946-62 / Bernard Sendall -- v. 2. Expansion and change, 1958-68 / Bernard Sendall -- v. 3. Politics and control, 1968-80 / Jeremy Potter -- v. 4. Companies and programmes, 1968-80 / Jeremy Potter.
Includes bibliographical references and indexes.