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Keen, M.: Cyril W. Cleverdon (1998)
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- Journal of documentation. 54(1998) no.3, S.265-273
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Keen, M.: ¬The Okapi projects (1997)
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- Source
- Journal of documentation. 53(1997) no.1, S.84-87
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Keen, M.: Interactive ranked retrieval using multiple match methods (1995)
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- S.247-258
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Keen, M.: Query reformulation in ranked output interaction (1994)
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- Pages
- S.150-161