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Piascik, J.M.: Enhanced subject access in Ohio public libraries (1993)
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Butterfield, K.: Online Public Access Catalogs (OPACs) (2009)
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Yee, M.M.: System design and cataloging meet the user : user interfaces to online public access catalogs (1991)
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Larson, R.R.: Evaluation of advanced retrieval techniques in an experimental online catalog (1992)
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Long, C.E.: Improving subject searching in Web-based OPACs : evaluation of the problem and guidelines for design (2000)
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