@misc{Culmann_Carl_(1821–1887)_Die_1875,
 author={Culmann, Carl (1821–1887)},
 copyright={Public Domain},
 address={Zürich},
 howpublished={online},
 year={1875},
 publisher={Verlag, von Meyer & Zeller (A. Reimmann)},
 language={ger},
 type={Text},
 title={Die graphische Statik. 1 Bd.},
}