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  1. Robertson, S.E.; Thompson, C.L.: ¬An operational evaluation of weighting, ranking and relevance feedback via a front-end system (1987) 8.03 
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    Author
    Robertson, S.E.
  2. Hancock-Beaulieu, M.; Robertson, S.E.; Neilson, C.: Evaluation of online catalogues : an assessment of methods (1990) 8.03 
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    Author
    Robertson, S.E.

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