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Richmond, P.A.: Precedent-setting contributions to modern classification (1988)
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Richmond, P.A.: Introduction to PRECIS for North American usage (1981)
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Richmond, P.A.: Classification from PRECIS : some possibilities (1976)
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Richmond, P.A.: ¬The future of classification (1974)
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Zumer, M.; Zeng, M.L.; Mitchell, J.S.: FRBRizing KOS relationships : applying the FRBR model to versions of the DDC (2012)
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Ullah, A.; Khusro, S.; Ullah, I.: Bibliographic classification in the digital age : current trends & future directions (2017)
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Fott, D.L.: Adding another file or why the MARC records shoundn't be enhanced (1991)
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Koubarakis, M.: Database models for infinite and indefinite temporal information (1994)
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