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  1. Voigt, K.: Information über Information : CD-ROM und Online-Datenbanken im Bereich Umweltschutz (1995) 9.75 
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  2. Voigt, K.; Benz, J.: Umweltschutz im Internet : Datenquellen zu ökologischen und chemischen Fragestellungen (1996) 9.75 
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