Search (1 results, page 1 of 1)

  • × author_ss:"Brakel, P.A. van"
  • × theme_ss:"Retrievalstudien"
  1. Van der Walt, H.E.A.; Brakel, P.A. van: Method for the evaluation of the retrieval effectiveness of a CD-ROM bibliographic database (1991) 0.00
    2.3911135E-4 = product of:
      0.005499561 = sum of:
        0.005499561 = product of:
          0.010999122 = sum of:
            0.010999122 = weight(_text_:1 in 3114) [ClassicSimilarity], result of:
              0.010999122 = score(doc=3114,freq=2.0), product of:
                0.057894554 = queryWeight, product of:
                  2.4565027 = idf(docFreq=10304, maxDocs=44218)
                  0.023567878 = queryNorm
                0.18998542 = fieldWeight in 3114, product of:
                  1.4142135 = tf(freq=2.0), with freq of:
                    2.0 = termFreq=2.0
                  2.4565027 = idf(docFreq=10304, maxDocs=44218)
                  0.0546875 = fieldNorm(doc=3114)
          0.5 = coord(1/2)
      0.04347826 = coord(1/23)
    
    Source
    African journal of library and information science. 59(1991) no.1, S.32-42