-
Gordon, M.; Kochen, M.: Recall-precision trade-off : a derivation (1989)
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- Source
- Journal of the American Society for Information Science. 40(1989) no.3, S.145-151
-
Cleverdon, C.W.; Mills, J.: ¬The testing of index language devices (1985)
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- Footnote
- Original in: Aslib proceedings 15(1963) no.4, S.106-130.
- Pages
- S.221-246
-
Lancaster, F.W.: Evaluating the performance of a large computerized information system (1985)
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- Footnote
- Original in: Journal of the American Medical Association 207(1969) S.114-120.
- Pages
- S.326-339
-
MacCain, K.W.; White, H.D.; Griffith, B.C.: Comparing retrieval performance in online data bases (1987)
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- Source
- Information processing and management. 23(1987), S.539-553