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  1. Hersh, W.; Pentecost, J.; Hickam, D.: ¬A task-oriented approach to information retrieval evaluation : overview and design for empirical testing (1996) 10.60 
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    Pentecost, J.
  2. Hersh, W.R.; Pentecost, J.; Hickam, D.H.: ¬A task-oriented approach to retrieval system evaluation (1995) 10.60 
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