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  • × subject_ss:"Reference services (Libraries)"
  1. Katz, W.A.: Introduction to reference work : Vol.1: Basic information sources; vol.2: Reference services and reference processes (1992) 5.17 
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  2. Reference and information services : an introduction (2001) 5.17 
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  3. Reference and information services : an introduction (1995) 5.17 
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