http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
Allegheny Portage Railroad National Historic Site
Historic structure report: Staple Bend Tunnel, Allegheny Portage Railroad National Historic Site, Pennsylvania
1 volume (various pagings) : illustrations ; 28 cm.
Title from title screen (viewed June 29, 2009).
"Historic structure report, architectural data section."
Mode of access: Internet from the NPS web site. Address as of 06/29/09: http://home.nps.gov/applications/parks/alpo/ppdocuments/sbtnew.pdf ; current access is available via PURL.
Allegheny Portage Railroad National Historic Site (Pa.)