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Katz, William A. (). Introduction to refence work volume 2:reference services and reference processes / William A.Katz . New York: Mcgraw-Hill Book Company.

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Katz, William A. Introduction to refence work volume 2:reference services and reference processes / William A.Katz. New York: Mcgraw-Hill Book Company, . Text.

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Katz, William A. Introduction to refence work volume 2:reference services and reference processes / William A.Katz. New York: Mcgraw-Hill Book Company, . Text.

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Katz, William A. Introduction to refence work volume 2:reference services and reference processes / William A.Katz. New York: Mcgraw-Hill Book Company, . Print.