http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
Servicio de mapas en Internet para la salud ambiental en la región fronteriza entre los Estados Unidos y México
Internet map service for environmental health in the U.S.-Mexico border region. Spanish
Title from title screen (viewed on Aug. 8, 2008).
Mode of access: Internet from the USGS web site. Address as of 8/8/08: http://pubs.usgs.gov/fs/2004/3140/pdf/FS2004-3140%5Fspan.pdf ; current access available via PURL.
English and Spanish versions accessible in PDF format from HTML index screen.
Fact sheet (Geological Survey (U.S.)) ; 2004-3140