• Karst Information Portal: Link

 

• USGS Karst Interest Group: Link

 

• Arkansas Water Resources Center

  Annual Technical Report 2008: Link

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• U.S. Geological Survey Karst Interest Group

  Proceedings, Fayetteville, Arkansas,

  April 26-29, 2011: Link

 

• Arkansas Department of Eniveromental Quality

  Integrated Water Quality Monitoring and Assessment Report 

  2010: Link

 

• Karst Regions Of The World (Krow)—Populating Global Karst
  Datasets And Generating Maps To Advance The Understanding
  Of Karst Occurrence And Protection Of Karst Species And
  Habitats Worldwide: Link