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Hellweg, H.; Krause, J.; Mandl, T.; Marx, J.; Müller, M.N.O.; Mutschke, P.; Strötgen, R.: Treatment of semantic heterogeneity in information retrieval (2001)
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Hellweg, H.: ¬Die GESIS Socio-Guide : ein kooperatives Link-Verwaltungs-System (2000)
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Hellweg, H.; Hermes, B.; Stempfhuber, M.; Enderle, W.; Fischer, T.: DBClear : a generic system for clearinghouses (2002)
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