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O'Brien, A.: Relevance as an aid to evaluation in OPACs (1990) 4.54

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Theme: OPAC

Husain, S.; O'Brien, A.: Recent trends in subject access to OPACs : an evaluation (1992) 4.54

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Theme: OPAC

Kreslins, K.; O'Brien, A.; Smith, I.A.: Online public access catalogues in Latvia : strategies for subject access (1994) 4.54

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Theme: OPAC

Ramesh Babu, B.; O'Brien, A.: Web OPAC interfaces : an overview (2000) 4.54

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Theme: OPAC

Tinker, A.J.; Pollitt, A.S.; O'Brien, A.; Braekevelt, P.A.: ¬The Dewey Decimal Classification and the transition from physical to electronic knowledge organisation (1999) 4.54

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Theme: OPAC

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