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Encyclopedia of Physical Science and Technology
Elsevier
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DIN-Normen
Beuth
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Artech House Ebooks
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Data-Planet
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Academic Search Elite (via EBSCO Host)
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Nineteenth Century Collections Online: Science, Technology and Medicine ; 1780-1925
Gale
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Oldenbourg-Link - Akademie-Link
de Gruyter-Oldenbourg
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Internet Library of Early Journals : A Digital Library of 18th and 19th Century Journals (nicht mehr online)
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SpringerLink
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Open Research Library (ORL)
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ProQuest Ebook Central
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utb elibrary
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