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Beall, J.; Kafadar, K.: ¬The effectiveness of copy cotaloging at eliminating typographical errors in shared bibliographic records (2004)
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Randall, N.B.: Spelling errors in the database : shadow or substance? (1999)
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Ballard, T.: Systematic identification of typographical errors in library catalogs (2008)
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Zakaria, M.S.: Measuring typographical errors in online catalogs of academic libraries using Ballard's list : a case study from Egypt (2023)
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Ballard, T.; Lifshin, A.: Prediction of OPAC spelling errors through a keyword inventory (1992)
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