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Boll, J.J.: DDC classification rules : an outline history and comparison of two sets of rules (1988)
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Ranganathan, S.R.: Elements of library classification (1959)
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Adler, M.: ¬The strangeness of subject cataloging : afterword (2020)
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Bell-Gam, R.A.: Problems with the basis for the title main entry of motion pictures according to the Anglo-American Cataloging Rules (1991)
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Aghemo, A.: Etica professionale e servizio di informazione (1993)
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