• Water Resources of the United States (USGS)
  The U.S. Geological Survey (USGS) collects information needed to understand the Nation's water resources, and provides access to water data, publications, and maps, as well as to recent water projects and events.
  in Fach > Geographie > Klima, Wetter & Umwelt with geographie themenportale umwelt wasser by 3 users

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