http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
N.W. Ayer and Son's Directory of Newspapers and periodicals
DIRECTORY Ayer son -- -- N.W. Ayer and Son's Directory of Newspapers -- and periodicals. Ed. R.Bruce Jones. Phila- -- delphia, Pen. 1870- . Jg.85(1953). - -- -- AB/Tr.