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servicios de referencia (bibliotecas)

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Cover of Basic reference sources by margaret taylor

Basic reference sources

By Margaret Taylor

Cover of Expert systems for reference and information retrieval by ralph alberico

Expert systems for reference and information retrieval

By Ralph Alberico

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

Ethics and reference services

By William Katz,Ruth A. Fraley

Cover of Weeding and maintenance of reference collections by sydney j. pierce

Weeding and maintenance of reference collections

By Sydney J. Pierce