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Nohr, H.: Sachliche Erschließung in deutschsprachigen Online-Publikumskatalogen (1989)
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Nohr, H.: Subject access in german-language OPACs : a survey (1989)
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Nohr, H.: Sachliche Erschließung in Online-Publikumskatalogen : Beschreibung and Analyse ausgewählter deutschsprachiger Systeme (1989)
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