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Wilson, T.D.: ¬An introduction to chain indexing (1971)
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Koblitz, J.: Schlagwortgebung in der Information und Dokumentation (1973)
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Supper, R.: Neuere Methoden der intellektuellen Indexierung : Britische Systeme unter besonderer Berücksichtigung von PRECIS (1978)
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Supper, R.: Neuere Methoden der intellektuellen Indexierung : Britische Systeme unter besonderer Berücksichtigung von PRECIS (1976)
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Spieler, K.-H.: Zur Theorie des Schlagwortkatalogs (1977)
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