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Tenopir, C.: Online databases : natural language searching with WIN (1993)
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Birmingham, J.: Internet search engines (1996)
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Edwards, D.H.: Evaluating Internet search tools : a librarian's guide (1997)
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Laan, H. van der: Northern Light : nieuw licht aan een veranderend firmament (1997)
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Dell'Orso, F.: Micro CDS/ISIS : analisi di un information retrieval system per personal computer (1995)
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