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Tolle, J.: Current utilisation of online catalogs : transaction log analysis: final report to the Council on Library Resources (1983)
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Borgman, C.L.: End user behavior on the Ohio State University Libraries' online catalog : a computer monitoring study (1983)
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Walker, S.; DeVere, R.: Improving subject retrieval in online catalogues : T.2: Relevance feedback and query expansion (1990)
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