Mode of access: Internet from USGS web site. Address as of 9/4/08: http://www.nwrc.usgs.gov/wdb/pub/hsi/hsi-019.pdf; current access available via PURL.
Note
Title from title screen (viewed on Sept. 4, 2008).
"July 1982."
Bibliography
Includes bibliographical references (p. 10-11).
Note
"FWS/OBS-82/10.19."
Reproduction
Electronic reproduction. Lafayette, La. : National Wetlands Research Center, [1999?]