Category:Copper(II) sulfate – Wikimedia Commons

https://commons.wikimedia.org/wiki/Category:Copper(II)_sulfate?uselang=de

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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…

Category:Chalcanthite – Wikimedia Commons

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

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http://wayback.archive.org/web/20161013070247/http://www.cup.uni-muenchen.de/ac/kluefers/homepage/standards/typography.html

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