@misc{Bruhns_Willy_(1864-1929)_Elemente,
 author={Bruhns, Willy (1864-1929)},
 howpublished={online},
 publisher={Franz Deuticke},
 language={ger},
 title={Elemente der Krystallographie},
 title={Krystallographie},
 type={książka},
 keywords={krystalografia},
}