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Williamson, N.J.: Online Klassifikation : Gegenwart und Zukunft (1988)
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- Klassifikationssysteme im Online-Retrieval
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Walker, S.: ¬Der Mensch-Maschine-Dialog bei Online-Benutzer-Katalogen (1987)
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Bates, M.J.: Designing online catalog subject acces to meet user needs (1989)
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Butcher, J.E.; Trotter, R.: Building on PRECIS : strategies for online subject access in the British Library (1989)
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