Mode of access: Internet from USGS web site. Address as of 7/24/01: http://www.nwrc.usgs.gov/wdb/pub/hsi/hsi-140.pdf; current access available via PURL.
Note
Title from title screen (viewed on July 24, 2001).
"June 1987."
Bibliography
Includes bibliographical references (p. 23-26).
Reproduction
Electronic reproduction. [Lafayette, La. : Library, National Wetlands Research Center, U.S. Fish and Wildlife Service, 199-]. Mode of access: World Wide Web. System requirements: Adobe Acrobat reader.