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Nourmohammadi, H.A.; Umstätter, W.: ¬Die Verteilung der Autorenhäufigkeit in wissenschaftlichen Zeitschriften bei verschiedenen Themen und Ländern (2004)
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Mayr, P.; Umstätter, W.: ¬Eine bibliometrische Zeitschriftenanalyse mit Jol Scientrometrics und NfD bzw. IWP (2008)
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Umstätter, W.: Wissen als geistiges Eigentum (2011)
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Umstätter, W.: Wäre es nicht langsam Zeit, die Informationstechnologie in der bibliothekarischen Sacherschließung etwas erster zu nehmen? : ein Wort zur RSWK (1991)
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Umstätter, W.: ¬Die Rolle der Dokumentation bei der Entstehung der Digitalen Bibliothek und ihre Konsequenzen für die Bibliothekswissenschaft (1995)
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Umstätter, W.; Rehm, M.; Dorogi, Z.: ¬Die Halbwertszeit in der naturwissenschaftlichen Literatur (1982)
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Umstätter, W.: Leistungsgrenzen der Dokumentations-, Informations-, Begriffs- und Wissensorganisation (2001)
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Umstätter, W.: Bibliographie, Kataloge, Suchmaschinen : Das Ende der Dokumentation als modernes Bibliothekswesen (2005)
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Umstätter, W.: ¬Die fundamentale Bedeutung der Informations- und Wissensmessung und ihre Beziehung zum System der Planckeinheiten (2006)
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Umstätter, W.: DDC in Europa : Hat der Einsatz in der Deutschen Nationalbibliothek unsere Zunft weitergebracht? Hat unsere Klientel etwas davon? (2008)
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Umstätter, W.: ¬Die Skalierung von Information, Wissen und Literatur (1992)
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Schwarz, I.; Umstätter, W.: Zum Prinzip der Objektdarstellung in SGML (1998)
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Umstätter, W.: Wissensorganisation mit Hilfe des semiotischen Thesaurus : auf der Basis von SGML bzw. XML (2000)
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Umstätter, W.: Zukunft der Informationswissenschaft : Vom Information Retrieval zur Wissensorganisation (2017)
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