http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
Memoir of the Niagara Falls suspension and Niagara Falls International bridge
Microfilm. Ann Arbor, Mich. University Microfilms (n.d.) (American Culture Series, Reel 301.2)
Papers and practical illustrations of public works of recent construction
Papers and practical illustrations of public works of recent contruction, pp. 1-39