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Williamson, N.J.: ¬The Library of Congress Classification : problems and prospects in online retrieval (1986)
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- International cataloguing. 15(1986), S.45-48
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Williamson, N.J.: ¬The Library of Congress Classification and the computer: research in progress (1989)
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- International cataloguing and bibliographic control. 18(1989), S.8-12
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Williamson, N.J.: ¬The role of classification in online systems (1989)
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- S.95-104
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Williamson, N.J.: Classification in online systems : research and the North American perspective (1985)
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- International cataloguing. 14(1985), S.29-31
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Williamson, N.J.: ¬The role of classification in online systems (1989)
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- Cataloging and classification quarterly. 10(1989) nos.1/2, S.95-104
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Williamson, N.J.: ¬The Library of Congress Classification in the computer age (1989)
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- S.58-64