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LeVan, R.R.: Searching Digital Libraries (2001)
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Schmidt, J.; Horn, A.; Thorsen, B.: Australian Subject Gateways, the successes and the challenges (2003)
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Chung, W.; Chen, H.: Browsing the underdeveloped Web : an experiment on the Arabic Medical Web Directory (2009)
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Blosser, J.; Michaelson, R.; Routh. R.; Xia, P.: Defining the landscape of Web resources : Concluding Report of the BAER Web Resources Sub-Group (2000)
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