@misc{Hesse_Ludwig_Otto_(1811–1874)_Die_1872,
 author={Hesse, Ludwig Otto (1811–1874)},
 copyright={Public Domain},
 address={Leipzig},
 howpublished={online},
 year={1872},
 publisher={B. G. Teubner},
 language={ger},
 language={ger},
 type={Text},
 title={Die vier Species},
 URL={http://www.rcin.org.pl/impan/Content/69082/PDF/WA35_18458_5937_Die-Entwickelung-7.pdf},
}