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Ballard, T.: Comparative searching styles of patrons and staff (1994)
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Bishop, B.W.: Location-based questions and local knowledge (2011)
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Mood, T.A.: Of sundials and digital watches : a further step toward the new paradigm of reference (1994)
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Chowdhury, G.G.: Digital libraries and reference services : present and future (2002)
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Cloughley, K.: Digital reference services : how do the library-based services compare with the expert services? (2004)
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