4 pages : illustrations (some color), color map ; 28 cm
OCLC
ocm56557399
Caption title.
"Prepared by Mary S. Ashman, Roy S. Socolow, and Joseph L. Zanca"--P. 4.
Shipping list no.: 2004-0269-P.
"April 2004."
Includes bibliographical references (page 4).
Also available via Internet from the USGS web site. Address as of 9/22/04: http://water.usgs.gov/pubs/fs/2004/3056/pdf/FS2004-3056%5Fweb.pdf; current access is available via PURL.