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Walford's guide to reference material : Vol.1: Science and technology. 1996 (1996)
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¬Der Brockhaus Naturwissenschaft und Technik (2002)
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Walford's guide to reference material : Vol.1: Science and technology (1999)
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Poetzsch, E.: Naturwissenschaftlich-technische Information : Online, CD-ROM, Internet (2005)
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