@misc{Klockmann_Friedrich_(1858-1937)_Lehrbuch,
 author={Klockmann, Friedrich (1858-1937)},
 howpublished={online},
 publisher={Ferdinand Enke},
 language={ger},
 type={książka},
 title={Lehrbuch der Mineralogie},
 keywords={mineralogia, podręczniki akademicki},
}