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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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Walsh, J.: ¬The use of Library of Congress Subject Headings in digital collections (2011)
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Schweighofer, E.: Downloading, information filtering and copyright (1997)
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Shiri, A.: Digital library research : current developments and trends (2003)
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Cooper, M.: Public libraries and EU information (1999)
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