http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
Prehistory-6th century -- 6th-15th centuries -- 15th century -- 16th century -- 17th century -- 18th century -- 19th century -- 20th century -- 21st century.
Includes bibliographical references and index.