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  Performance Systems International
  
  Plant Taxonomists and Herbaria Online (Harvard University)
  
  Plant Taxonomists and Herbaria Online (Harvard University)
  
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  Prime Computer
  
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  Quebecor Inc.
  
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  Rice University
  
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  Rochester Institute of Technology
  
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  Rutgers University
  
  Ryerson Polytechnic University, Canada
  
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  Saint Michael's College, Colchester VT
  
  Saint Norbert College
  
  Sam Houston State University Phone Book
  
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