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Reference and information services : an introduction (1991) 4.07

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Grogan, D.: Grogan's case studies in reference work : Vol.1-6 (1987) 4.07

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Grogan, D.: Practical reference work (1979) 4.07

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Reference and information services : an introduction (2001) 4.07

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Reference and information services : an introduction (1995) 4.07

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