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  • × year_i:[1980 TO 1990}
  • × author_ss:"Robertson, S.E."
  1. Robertson, S.E.; Thompson, C.L.: ¬An operational evaluation of weighting, ranking and relevance feedback via a front-end system (1987) 5.50 
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  2. Robertson, S.E.: ¬The methodology of information retrieval experiment (1981) 5.50 
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