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Source: U.S. National Park Service Weeds Gone Wild website
Author: Jil M. Swearingen, National Park Service, Center for Urban Ecology, Washington, DC
Author: Philip D. Pannill, U.S. Fish and Wildlife Service, National Conservation Training Center, Shepherdstown, WV
Editor: Jil M. Swearingen, National Park Service, Washington, DC
- 2012-12-18 23:27:22 UTC
- 2012-11-20 23:55:43 UTC