@misc{Posthumus_O._Fossilium,
 author={Posthumus, O.},
 howpublished={online},
 publisher={W. Junk},
 language={ger},
 title={Fossilium Catalogus. I, Animalia. Pars 24: O. Posthumus, Otolithi Piscium},
 type={czasopismo},
 keywords={paleontologia, czasopisma},
}