Montana State University.
The Center for Invasive Species Management closed in 2015. Archives of relevant materials are available here.
New Mexico Energy, Minerals and Natural Resources Department. State Forestry Division.
University of Tennessee Extension.
University of New Hampshire. Cooperative Extension; New Hampshire Department of Agriculture, Markets & Food.
Tennessee Department of Agriculture.
University of New Hampshire. Cooperative Extension.
Montana Fish, Wildlife, and Parks.
Tennessee Wildlife Resources Agency.
Tennessee Invasive Plant Council.
South Dakota Department of Health.