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Berinstein, P.: Communicating with library users : a self-study program (1994)
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Dewdney, P.; Michell, G.: Asking 'why' questions in the reference interview : a theoretical justification (1997)
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Burton, M.K.: Reference interview : strategies for children (1998)
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Nardi, B.A.; O'Day, V.: Intelligent agents : what we learned at the library (1996)
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Sawyer, D.: ¬A matter of confidence : asking reference questions over the Internet (1993)
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