Dudley, M.; Barraclough, C.: ¬The unobtrusive testing of public library information services : a pilot survey (1995)
0.01
0.010752852 = product of:
0.021505704 = sum of:
0.021505704 = product of:
0.04301141 = sum of:
0.04301141 = weight(_text_:c in 2158) [ClassicSimilarity], result of:
0.04301141 = score(doc=2158,freq=2.0), product of:
0.14107318 = queryWeight, product of:
3.4494052 = idf(docFreq=3817, maxDocs=44218)
0.040897828 = queryNorm
0.3048872 = fieldWeight in 2158, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.4494052 = idf(docFreq=3817, maxDocs=44218)
0.0625 = fieldNorm(doc=2158)
0.5 = coord(1/2)
0.5 = coord(1/2)