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Gebhardt, W.: ¬Der neue Sachkatalog der westdeutschen Bibliothek (1951)
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Klassifikationssystem för Svenska Bibliothek (1957 ff.)
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- Language
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Luhn, H.P.: Keyword-in-context index for technical literature : KWIC index (1959)
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- Footnote
- Reprinted in: Theory of subject analysis: a sourcebook. Ed. by. L.M. Chan et al. Littleton, CO: Libraries Unlimited 1985, S.170-180