http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
The shape of things to come, 1920-1939 -- Great day coming, 1940-1945 -- The best is yet to come, 1946-1964 -- Future shock, 1965-1979 -- The empire strikes back, 1980-1994 -- The matrix, 1995-.
Includes bibliographical references (pages [231]-235) and index.