Methods and sources of data used to develop selected water-quality indicators for streams and ground water for the 2007 edition of the State of the Nation's Ecosystems Report with comparisons to the 2002 edition [electronic resource] / by John T. Wilson ... [et al.].
Mode of access: Internet via the USGS web site. Address as of 07/11/08: http://pubs.usgs.gov/of/2008/1110/pdf/ofr2008-1110%5fweb.pdf; current access available via PURL.
Note
Title from PDF title screen (viewed on Apr. 9, 2008).
"National Water-Quality Assessment Program."
File Type
This report also includes 1 oversized table (PDF and Excel formats) and 25 appendixes (Excel format), which are available for viewing and printing.