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Richmond, P.A.: Futuristic aspects of subject access (1983)
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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.: Reading list in classification theory (1972)
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Studwell, W.E.; Wang, R.; Wu, H.: Ideological influences on book classification schemes in the People's Republic of China (1994)
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Mitchell, J.S.: DDC21 and beyond : the Dewey Decimal Classification prepares for the future (1995)
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Williamson, N.J.: Classification in the Millennium (1997)
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Pocock, H.: Classification schemes : development and survival (1997)
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