
Robertson, M.A.: Windows 3.0 for the online searcher (1991)
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Robertson, S.E.: Some recent theories and models in information retrieval (1980)
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Robertson, S.E.: Theories and models in information retrieval (1977)
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Robertson, S.E.: On term selection for query expansion (1990)
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Robertson, S.E.: On relevance weight estimation and query expansion (1986)
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MacAdam, E.J.: Cyril Cleverdon (1998)
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MacAdam, E.J.: Cyril Cleverdon (1998)
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Keen, M.: Cyril W. Cleverdon (1998)
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In memoriam : Abraham Bookstein (2013)
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Jacobs, J.W.; Summers, E.; Ankersen, E.: Cyril: expanding the horizons of MARC21 (2004)
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