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Tennis, J.T.: Facets and fugit tempus : considering time's effect on faceted classification schemes (2012)
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Chen, K.-n.: Dynamic subject numbers replace traditional classification numbers (2013)
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Gomez, I.: Coping with the problem of subject classification diversity (1996)
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Bothmann, R.: Cataloging electronic books (2004)
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Mulvany, N.C.: Back-of-the-book indexing (2009)
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