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Kurzke, C.; Galle, M.; Bathelt, M.: WebAssistant : a user profile specific information retrieval assistant (1998)
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Collins, S.: Find it! (Again) : Part 2 (1998)
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Collins, S.: Find it! : Part 1 (1998)
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Cheong, F.C.: Internet agents : spiders, wanderers, brokers, and bots (1996)
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Search tools (1997)
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Hume, C.: Internet search engines and robots : what they are and how to use them (2000)
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