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¬The language engineering directory (1993)
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Markey, K.: Twenty-five years of end-user searching : part 2: future research directions (2007)
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Dubey, Y.P.: Expert systems and their application in library and information science (1996)
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Drenth, H.; Morris, A.; Tseng, G.: Expert systems as information intermediaries (1991)
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Paice, C.D.: Expert systems for information retrieval? (1986)
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