Mode of access: Internet from the UMESC web site. Address as of 5/10/07: http://www.umesc.usgs.gov/documents/fact%5Fsheets/tours.pdf ; current access is available via PURL.
Note
Title from PDF title screen (viewed June 21, 2004).
"May 2004."
At head of title: Upper Midwest Environmental Sciences Center, La Crosse, Wisconsin.