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U.S. Department of Agriculture
National Invasive Species Information Center
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Invasive Species Resources

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Alien Plant Research Studies and Surveys
Pacific Biodiversity Institute (Washington).
Asian Clams - Lake George Fact Sheet No. 53 (Feb 2014) (PDF | 143 KB)
Fund for Lake George (New York).
Biodiversity - Invasive Species
Lake Champlain Land Trust.
Effect of Spiny Water Flea on Lake George
Lake George Association (New York).
Invasive Gardening and Landscaping Plants: Invasive in Native Habitats of the Southern Willamette Valley
Native Plant Society of Oregon. Emerald Chapter.
Invasive Plants: Let's Stop These Silent Invaders
SOLVE (Oregon).
Invasive Species in the Lake George Watershed
Lake George Association (New York).
Invasive Species in the Lake George Watershed: Invasive Asian Clams
Lake George Association (New York).
Invasive Species Monitoring and Control
Northeast Iowa Resource Conservation and Development.
Iowa County Weed Commissioners Organization
Iowa County Weed Commissioners Organization.
Okoboji Protective Association
Okoboji Protective Association.
Plant Info - Invasive Species
Boone County Arboretum (Kentucky).
Preserve the Lakes - Aquatic Invasive Species
Iowa Great Lakes Association.
Spiny Water Flea - Lake George Fact Sheet No. 25 (Feb 2014) (PDF | 136 KB)
Fund for Lake George (New York).
The Feral Hog in Oklahoma (2010)
Samuel Roberts Noble Foundation.
Publication NF-WF-10-01, 2nd Edition
The Silent Invasion

Oregon Public Broadcasting.
Wallowa County Weed Watch: Medusahead Rye (PDF | 187 KB)
Wallowa Resources (Oregon).
See also: Top Ten Weeds in Wallowa County for more fact sheets