Alberta Invasive Species Council (Canada).
See also: Fact Sheets for more information about individual invasive species, including those listed as "Prohibited Noxious" and "Noxious" under the Alberta Weed Control Act
DOC. NOAA. Great Lakes Environmental Research Laboratory; DOI. USGS. Wetland and Aquatic Research Center.
World Conservation Union. Invasive Species Specialist Group.
Tip of the Mitt Watershed Council (Michigan).
Ontario's Invading Species Awareness Program (Canada).
University of Wisconsin Sea Grant.