http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
v.1: From the sixth century B.C. to the end of the middle ages, 1920 v.2: From the revival of Learning to the end of the eighteenth century, in Italy, France, England and the Netherlands,1908 v.3: The eighteenth century in Germany and the nineteenth century in Europe and the United States of America