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Swanson, D.R.: Searching natural language by computer (1960)
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Swanson, D.R.: Requirements study for future catalogs (1972)
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Swanson, D.R.: Subjective versus objective relevance in bibliographic retrieval systems (1986)
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Swanson, D.R.: Information retrieval as a trial-and-error process (1977)
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Swanson, D.R.: ¬The evidence underlying the Cranfield results (1965)
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Cleverdon, C.W.; Mills, J.: ¬The testing of index language devices (1985)
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Gillman, P.: Text retrieval (1998)
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Dubois, C.P.R.: Text retrieval 92 : summary of papers and trends (1993)
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Voorhees, E.M.: On test collections for adaptive information retrieval (2008)
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Keen, M.: Cyril W. Cleverdon (1998)
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