U.S. Geological Survey (USGS), meer
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- Elevation measurements along a historical marsh loss gradient in the Blackwater Estuary, MD, USA in 2014, meer
- Elevation measurements of marsh-pond transitions along a historical marsh loss gradient in the Blackwater Estuary, MD, USA in 2014, meer
- Marsh plant survey along a historical marsh loss gradient in the Blackwater Estuary, MD, USA in 2014, meer
- Water level measurements along a historical marsh loss gradient in the Blackwater Estuary, MD, USA in 2014, meer
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