http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
Catalogue of English and American chapbooks and broadside ballads in Harvard College Library
Tillinghast, William H. (William Hopkins)
Compiled by Charles Welsh and William H. Tillinghast.
Reprint of the 1905 edition with a new introductory note by Leslie Shepard.
Bibliographical contributions of the Library of Harvard University ; no. 56