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    • A Hierarchical Framework of Aquatic Ecological Units in North America (Nearctic Zone) 

      Maxwell, James R.; Edwards, Clayton J.; Jensen, Mark E.; Paustian, Steven J.; Parrott, Harry; Hill, Donley M. (United States Department of Agriculture, Forest Service, 1995-05)
      The objectives of this report are to provide: 1. A generic hierarchical framework for characterizing aquatic ecosystems. 2. A description of linkages between terrestrial and aquatic biophysical environment maps. 3. ...