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Research questions for the twenty-first century (2003)
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Macgregor, G.: ¬The nature of information in the twenty-first century : conundrums for the informatics community? (2005)
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Crosby, E.: Technical services in twenty-first century special collections (2000)
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Riesthuis, G.J.A.; Schmitz-Esser, W.: Bibliography of 10 years International Society for Knowledge Organization (1999)
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Seadle, M.: Education for twenty-first century librarians (2004)
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