Odini, C.: ¬The performance of manual indexes and online databases in information retrieval (1997)
0.01
0.0078517925 = product of:
0.047110755 = sum of:
0.047110755 = weight(_text_:services in 3905) [ClassicSimilarity], result of:
0.047110755 = score(doc=3905,freq=2.0), product of:
0.16591617 = queryWeight, product of:
3.6713707 = idf(docFreq=3057, maxDocs=44218)
0.045191888 = queryNorm
0.28394312 = fieldWeight in 3905, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.6713707 = idf(docFreq=3057, maxDocs=44218)
0.0546875 = fieldNorm(doc=3905)
0.16666667 = coord(1/6)
- Source
- OCLC systems and services. 13(1997) no.1, S.21-24