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Summaries of Annual Effort
2018 Survey Year [PDF]
2017 Survey Year [PDF]
2016 Survey Year [PDF]
2015 Survey Year [PDF]
2014 Survey Year [PDF]
U.S. Participant Milestones
2018 Survey Year [PDF]
U.S. Department of the Interior | U.S. Geological Survey
Eastern Ecological Science Center Laurel, MD, USA 20708-4038
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Last Modified: 2/5/2023
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