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Lorenzen, K.F.: Suchet, so werdet ihr finden : OPAC-Recherche auf einen Blick (1993)
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Lorenzen, M.: Using the Internet for reference service (1995)
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Lorenzen, M.: Management by wandering around : reference rovering and quality reference service (1998)
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Lorenzen, H.-J.: Kooperation zur Klassifikationspflege (2004)
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Heinrich, G.: ¬Die Entwicklung einheitlicher "Regeln für den Schlagwortkatalog" (RSWK) und ihr Stellenwert in der verbalen und klassifikatorischen Sacherschließung (1985)
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Allegro - Sacherschließung (1991)
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nestor-Handbuch : eine kleine Enzyklopädie der digitalen Langzeitarchivierung (2010)
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Mestermann, J.; Pohl, U.: Kategorienformat 'Allegro-NW' (1994)
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Allers, H.: Allegro-C : Lehrbuch (1993)
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Eversberg, B.: Allegro-Fortbildung 2015 (2015)
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