@misc{Trümpener_Egon_Mineralogisches_1927,
 author={Trümpener, Egon},
 year={1927},
 rights={Domena publiczna (Public domain)},
 publisher={Kalkverlag G. m. b. H.},
 language={ger},
 title={Mineralogisches vom Kalt},
 type={książka},
 keywords={mineralogia},
}