Tree swallows, a nationwide sentinel species for assessing and monitoring aquatic contamination.
Corporate Author: | |
---|---|
Format: | Government Document eBook |
Language: | English |
Published: |
La Crosse, WI :
U.S. Dept. of the Interior, U.S. Geological Survey, Upper Midwest Environmental Sciences Center,
[2004]
|
Series: | Fact sheet (Geological Survey (U.S.)) ;
2004-3042. |
Subjects: | |
Online Access: | https://purl.fdlp.gov/GPO/LPS81327 |
Item Description: | Title from PDF title screen (viewed June 17, 2004). "April 2003." Electronic resource. |
---|---|
Physical Description: | 2 unnumbered pages : digital, PDF file. |
Format: | Mode of access: Internet from the UMESC web site. Address as of 5/08/07: http://www.umesc.usgs.gov/documents/fact%5Fsheets/swallows.pdf ; current access is available via PURL. |