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Severiens, T.: ¬A distributed portal for physics (2002)
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Yang, S.; Han, R.; Ding, J.; Song, Y.: ¬The distribution of Web citations (2012)
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Joint, N.: Evaluating the quality of library portals (2005)
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Behnke, R.-I.: 25 Jahre "Zeitschriftendienst" (ZD) (1990)
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Duchemin, P.-Y.: Retroconversion of French cartographic material card catalogues : an overview of the situation (1993)
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