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Spink, A.; Gunar, O.: E-Commerce Web queries : Excite and AskJeeves study (2001)
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Lim, E.: Subject Gateways in Südostasien : Anwendung von Klassifikationen (1999)
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Warnick, W.L.; Leberman, A.; Scott, R.L.; Spence, K.J.; Johnsom, L.A.; Allen, V.S.: Searching the deep Web : directed query engine applications at the Department of Energy (2001)
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