http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
Interim results of quality-control sampling of surface water for the Upper Colorado River National Water-Quality Assessment Study Unit, water years 1995-96
by Norman E. Spahr and Robert W. Boulger.
Title from title screen (viewed Nov. 5, 2003).
Mode of access: Internet from the USGS Web site. Address as of 11/05/03: http://water.usgs.gov/pubs/wri/wri97-4227/pdf/wrir97-4227.pdf; current access is available via PURL.
Water-resources investigations report ; 97-4227