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  1. Laan, H. van der: Northern Light : nieuw licht aan een veranderend firmament (1997) 10.28
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  2. Laan, H. van der: Nieuwe Nederlandse Web-Woelers (1998) 10.28
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  3. Laan, H. van der; Mettrop, W.: Werkgroep IRT (1) : search engines aan de tand gevoeld (1998) 10.28
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