Schabas, A.H.: ¬A comparative evaluation of the retrieval effectiveness of titles, Library of Congress Subject Headings and PRECIS strings for computer searching of UK MARC data (1979)
0.01
0.007834448 = product of:
0.023503343 = sum of:
0.023503343 = product of:
0.047006685 = sum of:
0.047006685 = weight(_text_:library in 5277) [ClassicSimilarity], result of:
0.047006685 = score(doc=5277,freq=2.0), product of:
0.13484047 = queryWeight, product of:
2.6293786 = idf(docFreq=8668, maxDocs=44218)
0.051282257 = queryNorm
0.34860963 = fieldWeight in 5277, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
2.6293786 = idf(docFreq=8668, maxDocs=44218)
0.09375 = fieldNorm(doc=5277)
0.5 = coord(1/2)
0.33333334 = coord(1/3)