Mode of access: Internet at the USGS web site. Address as of 8/21/08: http://pubs.usgs.gov/sir/2005/5225/sir20055225.pdf ; current access is available via PURL.
Note
Title from PDF title page (viewed on Aug. 21, 2008).
At head of title on cover: National Water-Quality Assessment Program, National Synthesis on Volatile Organic Compounds.