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Richardson, E.C.: Classification: theoretical and practical (1964)
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Richardson, J.: Pointing the index finger (1994)
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Richardson, J.V.: Knowledge-based systems for general reference work : applications, problems, and progress (1995)
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Richardson, D.: Just the facts (1996)
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Richardson, J.V.: Question master : an evaluation of a Web-based decision-support system for use in reference environments (1998)
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Grobe, K.: Da wird die Goldprägung blaß : Lehrt die Konkurrenz das Fürchten: Die Encarta-Enzyklopädie von Microsoft (1998)
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Grobe, K.: Encarta-Enzyklopädie (1997)
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Microsoft releases titles in DVD-ROM format (1999)
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Jascó, P.: CD-ROMs for the holiday season : recommended titles offer more than their online, Web-based versions (1997)
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Graff, B.: Microsoft Encarta : Goethe höret die Signale (2000)
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