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servicʹo de referencia

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Cover of Reference and information services in the 21st century by kay ann cassell

Reference and information services in the 21st century

By Kay Ann Cassell

Cover of Evaluation of reference services by william a. katz,ruth a. fraley

Evaluation of reference services

By William A. Katz,Ruth A. Fraley

Cover of Going live by steve coffman

Going live

By Steve Coffman