http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
Aerial photography summary record system
Title from title screen (viewed on Nov. 03, 2004).
Mode of access: Internet from the USGS Web site. Address as of 6/1/05: http://permanent.access.gpo.gov/websites/ergusgsgov/erg.usgs.gov/isb/pubs/factsheets/fs22096.pdf; current access is available via PURL.
Fact sheet (Geological Survey (U.S.)) ; FS-96-220