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  Barium – Umweltprobenbank des Bundes

  https://www.umweltprobenbank.de/de/documents/profiles/analytes/10084

  Erdalkalimetall, das natürlich in Gesteinen und Mineralien vorkommt

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  A Dictionary of Chemistry - Google Books

  https://books.google.de/books?id=UXMqCwAAQBAJ

  Fully revised and updated, the seventh edition of this popular dictionary is the ideal reference resource for students of chemistry, either at school or at university. With over 5000 entries—over 175 new to this edition—it covers all aspects of chemistry,…

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  Bismut Element - Google-Suche

  http://www.google.de/search?hl=de&num=100&q=Bismut+Element&meta=

  Keine Beschreibung vorhanden.

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