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  • × year_i:[1960 TO 1970}
  1. Robertson, S.E.: ¬The parametric description of retrieval tests : Part I: The basic parameters (1969) 8.03 
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    Author
    Robertson, S.E.
  2. Robertson, S.E.: ¬The parametric description of retrieval tests : Part II: Overall measures (1969) 8.03 
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