@misc{Balzer_Richard_(1818–1887)_Die_1883,
 author={Balzer, Richard (1818–1887)},
 copyright={Public Domain},
 address={Leipzig},
 howpublished={online},
 year={1883},
 publisher={Verlag von S. Hirzel},
 language={ger},
 title={Die elemente der Mathematik. 2 Bd., Planimetrie, Stereometrie, Trigonometrie},
 type={Text},
}