University of Wisconsin. Sea Grant Institute.
Montana State University.
The Center for Invasive Species Management closed in 2015. Archives of relevant materials are available here.
University of Connecticut. Department of Plant Science and Landscape Architecture.
University of Wisconsin - Madison.
Universidad de Concepción (Chile).
Pennsylvania State University. Cooperative Extension.
Colorado State University. Department of Bioagricultural Sciences and Pest Management.
University of Wisconsin - Extension.