Montana State University.
The Center for Invasive Species Management closed in 2015. Archives of relevant materials are available here.
Maine Department of Conservation. Maine Forest Service. Forest Health and Monitoring Division.
University of Maine. Cooperative Extension.
Mississippi State University. Extension Service.
Mississippi State University. Geosystems Research Institute.
North Dakota Department of Trust Lands.
North Dakota Department of Agriculture.
Montana Fish, Wildlife, and Parks.
Mississippi State University. Center for Resolving Human-Wildlife Conflicts.