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Supper, R.: PRECIS, ein computerunterstütztes alphabetisches Indexierungssystem (1975)
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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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