Description
Item Description:Title from PDF title screen (viewed on Oct. 20, 2008).
Edition statement from HTML title screen.
"This study was sponsored by the U.S. Geological Survey and Bureau of Reclamation through the Grand Canyon Monitoring and Research Center"--Acknowledgements, page 13.
Electronic resource.
Physical Description:iv, 14 pages : digital, PDF file.
Format:Mode of access: Internet via the USGS web site. Address as of 11/18/08: http://pubs.usgs.gov/of/2008/1264/of2008-1264.pdf ; current access available via PURL.
Bibliography:Includes bibliographical references.