By Hahn Susan E   in Reference Services Review

ISSN:0090-7324|25|2|7-13

Emerald Group Publishing Ltd‎(1997)‎

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By Wyatt Anna May   Hahn Susan E.   in Reference Services Review

ISSN:0090-7324|39|2|303-317

Emerald Group Publishing Ltd‎(2011)‎

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