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Zumer, M.; Zeng, L.: Comparison and evaluation of OPAC end-user interfaces (1994)
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Zumer, M.; Riesthuis, G.J.A.: Consequences of implementing FRBR : are we ready to open pandora's box? (2002)
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Riesthuis, G.J.A.; Zumer, M.: FRBR and FRANAR : subject access (2004)
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