@misc{Zirkel_Ferdinand_(1838-1912)_Die,
 author={Zirkel, Ferdinand (1838-1912)},
 address={Berlin},
 howpublished={online},
 publisher={C. G. Lüderitz'sche Verlagsbuchhandlung, Carl Habel},
 language={ger},
 type={broszura},
 title={Die Umwandlunsprocesse im Mineralreich},
 keywords={Minerały},
}