@misc{Rybowski_Mikołaj_Słowik_1899,
 author={Rybowski, Mikołaj},
 copyright={Public Domain},
 address={Lwów},
 howpublished={online},
 year={1899},
 publisher={Nakładem Towarzystwa Ochrony Zwierząt},
 language={pol},
 type={Text},
 title={Słowik : obrazek z historyi naturalnej},
 URL={http://rcin.org.pl./Content/141337/PDF/WA058_169693_S27638_Slowik-obraz-Rybowsk.pdf},
 keywords={Luscinia luscinia, Luscinia megarhynchos, thrush nightingale - behavior, common nightingale - behavior, captive wild birds},
}