http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
Trends in streamflow of the San Pedro River, southeastern Arizona, and regional trends in precipitation and streamflow in southeastern Arizona and southwestern New Mexico
Title from PDF title page (viewed Aug. 7, 2008).
Mode of access: Internet from the USGS web site. Address as of 8/7/08: http://pubs.usgs.gov/pp/pp1712/pdf/pp1712.pdf ; current access is available via PURL.
U.S. Geological Survey professional paper ; 1712