Montana State University.
The Center for Invasive Species Management closed in 2015. Archives of relevant materials are available here.
New York City Department of Health.
New York Invasive Species Clearinghouse.
Cornell University. Forest Health and Invasive Non-native Forest Pests.
University of New Hampshire. Cooperative Extension; New Hampshire Department of Agriculture, Markets & Food.
New York State Department of Environmental Conservation.
New York Department of Environmental Conservation.
Cornell University. New York State Integrated Pest Management Program.
New York State Department of Agriculture and Markets.
University of New Hampshire. Cooperative Extension.
Montana Fish, Wildlife, and Parks.
South Dakota Department of Health.