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  1. Cleverdon, C.W.; Mills, J.; Keen, M.: Factors determining the performance of indexing systems : ASLIB Cranfield research project (1966) 9.88
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    Author
    Keen, M.
  2. Keen, M.: Query reformulation in ranked output interaction (1994) 9.88
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    Author
    Keen, M.
  3. Keen, M.: Interactive ranked retrieval using multiple match methods (1995) 9.88
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    Author
    Keen, M.
  4. Keen, M.: ¬The Okapi projects (1997) 9.88
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    Author
    Keen, M.
  5. Keen, M.: Cyril W. Cleverdon (1998) 9.88
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    Author
    Keen, M.