St. Croix Wetland Management District [electronic resource] : Comprehensive Conservation Plan and Environmental Assessment / U.S. Fish & Wildlife Service.
Imprint
[Washington, D.C.] : St. Croix Wetland Management District, U.S. Fish and Wildlife Service, Region 3, [2008]
Mode of access: Internet from Fish and Wildlife Service web site. Address as of 12/10/08: http://www.fws.gov/midwest/planning/stcroix/index.html; current access available via PURL.