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Mitev, N.N.; Walker, S.: Information retrieval aids in an online public access catalogue : automatic intelligent search sequencing (1985)
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Hancock-Beaulieu, M.; Mitev, N.N.: Online library catalogues : the interactive dimension (1989)
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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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