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Grossman, D.A.; Frieder, O.: Information retrieval : algorithms and heuristics (2004)
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Franke, F; Klein, A.; Schüller-Zwierlein, A.: Schlüsselkompetenzen : Literatur recherchieren in Bibliotheken und Internet (2010)
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Chu, H.: Information representation and retrieval in the digital age (2010)
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