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Nohr, H.: Subject access in german-language OPACs : a survey (1989)
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Nohr, H.: Tendenzen der OPAC-Entwicklung (1990)
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Nohr, H.: Sachliche Erschließung in deutschsprachigen Online-Publikumskatalogen (1989)
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Nohr, H.: Zum Sachzugriff über Stichworte in Online-Publikumskatalogen (OPACs) (1991)
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