@misc{Hummel_K._Fossilium,
 author={Hummel, K.},
 copyright={Biblioteka Politechniki Gdańskiej},
 howpublished={online},
 publisher={W. Junk},
 language={ger},
 type={czasopismo},
 title={Fossilium Catalogus. I, Animalia. Pars 52: K. Hummel, Trionychia fossilia},
 keywords={paleontologia, czasopisma},
}