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Poynder, R.: Web research engines? (1996)
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Peereboom, M.: DutchESS : Dutch Electronic Subject Service - a Dutch national collaborative effort (2000)
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Jenkins, C.: Automatic classification of Web resources using Java and Dewey Decimal Classification (1998)
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Ardo, A.; Lundberg, S.: ¬A regional distributed WWW search and indexing service : the DESIRE way (1998)
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Place, E.: International collaboration on Internet subject gateways (2000)
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Bar-Ilan, J.; Belous, Y.: Children as architects of Web directories : an exploratory study (2007)
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Dodd, D.G.: Grass-roots cataloging and classification : food for thought from World Wide Web subject-oriented hierarchical lists (1996)
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Lee, H.-L.; Olson, H.A.: Hierarchical navigation : an exploration of Yahoo! directories (2005)
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Van der Walt, M.: ¬The structure of classification schemes used in Internet search engines (1998)
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