Montana State University.
The Center for Invasive Species Management closed in 2015. Archives of relevant materials are available here.
Barataria-Terrebonne National Estuary Program.
Convention on Biological Diversity. Clearing-House Mechanism; Palau Office of Environmental Response and Coordination.
Maryland Department of Natural Resources.
Louisiana Department of Wildlife and Fisheries.
Encyclopedia of New Zealand.
Montana Fish, Wildlife, and Parks.