Black, J.D.: ¬The keyword : its use in abstracting, indexing and retrieving and information (1962)
0.00
0.0011927172 = product of:
0.01669804 = sum of:
0.01669804 = weight(_text_:information in 4977) [ClassicSimilarity], result of:
0.01669804 = score(doc=4977,freq=2.0), product of:
0.053807784 = queryWeight, product of:
1.7554779 = idf(docFreq=20772, maxDocs=44218)
0.030651359 = queryNorm
0.3103276 = fieldWeight in 4977, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
1.7554779 = idf(docFreq=20772, maxDocs=44218)
0.125 = fieldNorm(doc=4977)
0.071428575 = coord(1/14)