http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
[v. 1] A fourth reader.--[v. 2.] A fifth reader.--[v. 3.] A sixth reader.--[v. 4.] A seventh reader.--[v. 5.] An eighth reader.
By William Iler Crane and William Henry Wheeler.