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Rowley, J.E.: Organising knowledge : An introduction to information retrieval (1987)
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Rijsbergen, C.J. van: Information retrieval (1979)
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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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Liebenau, J.; Backhouse, J.: Understanding information : an introduction (1990)
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Integrated online library catalogs (1991)
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