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  Category:Praseodymium compounds – Wikimedia Commons

  https://commons.wikimedia.org/wiki/Category:Praseodymium_compounds?uselang=de

  Keine Beschreibung vorhanden.

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  Category:Sulfates – Wikimedia Commons

  https://commons.wikimedia.org/wiki/Category:Sulfates?uselang=de

  Keine Beschreibung vorhanden.

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  Handbook of Inorganic Compounds - Dale L. Perry - Google Books

  https://books.google.de/books?id=SFD30BvPBhoC#v=onepage

  This updated edition of the Handbook of Inorganic Compounds is the perfect reference for anyone that needs property data for compounds, CASRN numbers for computer or other searches, a consistent tabulation of molecular weights to synthesize inorganic…

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