Cleverdon, C.W.; Mills, J.; Keen, M.: Factors determining the performance of indexing systems : ASLIB Cranfield research project (1966)
0.02
0.023022233 = product of:
0.069066696 = sum of:
0.069066696 = weight(_text_:j in 5363) [ClassicSimilarity], result of:
0.069066696 = score(doc=5363,freq=2.0), product of:
0.14052401 = queryWeight, product of:
3.1774964 = idf(docFreq=5010, maxDocs=44218)
0.044224758 = queryNorm
0.4914939 = fieldWeight in 5363, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.1774964 = idf(docFreq=5010, maxDocs=44218)
0.109375 = fieldNorm(doc=5363)
0.33333334 = coord(1/3)
