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Ford, N.: Expert systems and artificial intelligence : an information manager's guide (1991)
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Wheatley, A.: Subject trees on the Internet : a new role for bibliographic classification? (2000)
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Williams, J.G.; Sochats, K.: Application of expert agents/assistants in library and information systems (1996)
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Lawrence, G.S.: System features for subject access in the online catalog (1985)
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Chan, L.M.; Hodges, T.: Subject cataloguing and classification : the late 1980s and beyond (1990)
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