Mode of access: Internet from USGS web site. Address as of 9/11/08: http://www.nwrc.usgs.gov/wdb/pub/hsi/hsi-141.pdf; current access available via PURL.
Note
Title from title screen (viewed on Sept. 11, 2008).
"June 1987."
Bibliography
Includes bibliographical references (p. 16-18).
Reproduction
Electronic reproduction. Lafayette, La. : National Wetlands Research Center, [200u?]