Butcher, J.E.; Trotter, R.: Building on PRECIS : strategies for online subject access in the British Library (1989)
0.01
0.014456945 = product of:
0.04337083 = sum of:
0.04337083 = weight(_text_:on in 996) [ClassicSimilarity], result of:
0.04337083 = score(doc=996,freq=2.0), product of:
0.12748455 = queryWeight, product of:
2.199415 = idf(docFreq=13325, maxDocs=44218)
0.05796293 = queryNorm
0.34020463 = fieldWeight in 996, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
2.199415 = idf(docFreq=13325, maxDocs=44218)
0.109375 = fieldNorm(doc=996)
0.33333334 = coord(1/3)