Description
Item Description:Title from title screen (viewed on Sept. 4, 2008).
"September 1983."
"FWS/OBS-82/10.34."
Electronic resource.
Physical Description:vi, 23 pages : digital, PDF file.
Format:Mode of access: Internet from USGS web site. Address as of 9/4/08: http://www.nwrc.usgs.gov/wdb/pub/hsi/hsi-034.pdf ; current access available via PURL.
Bibliography:Includes bibliographical references (pages 19-22).