Tree swallows, a nationwide sentinel species for assessing and monitoring aquatic contamination.

Other author Upper Midwest Environmental Sciences Center (Geological Survey)
Format Electronic
Publication InfoLa Crosse, WI : U.S. Dept. of the Interior, U.S. Geological Survey, Upper Midwest Environmental Sciences Center, [2004]
Description2 unnumbered pages : digital, PDF file.
Supplemental Contenthttps://purl.fdlp.gov/GPO/LPS81327
Subjects

Variant title Tree swallows
SeriesFact sheet ; FS 2004-3042
Fact sheet (Geological Survey (U.S.)) 2004-3042. ^A466711
General noteTitle from PDF title screen (viewed June 17, 2004).
General note"April 2003."
Technical detailsMode 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.
GPO item number0621-L (online)
Govt. docs number I 19.127:2004-3042