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Hancock-Beaulieu, M.; Walker, S.: ¬An evaluation of automatic query expansion in an online library catalogue (1992)
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Beaulieu, M.M.; Gatford, M.; Huang, X.; Robertson, S.E.; Walker, S.; Williams, P.: Okapi an TREC-5 (1997)
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Walker, S.: Subject access in online catalogues (1991)
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Mitev, N.N.; Venner, G.M.; Walker, S.: Designing an online public access catalogue : OKAPI, a catalogue on a local area network (1985)
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Ogden, J.; Summers, E.; Walker, S.: Know(ing) infrastructure : the Wayback Machine as object and instrument of digital research (2023)
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