@misc{Krupa_Adam_The_1999,
 author={Krupa, Adam},
 volume={55},
 number={6},
 copyright={Creative Commons Attribution BY 3.0 PL license},
 journal={Let's protect Our Indigenous Nature},
 address={Kraków},
 howpublished={online},
 year={1999},
 publisher={Institute of Nature Conservation of the Polish Academy of Sciences},
 language={pol},
 title={The first records of Chlidonias hybridus in the Landscape Park on the Warta River (Nadwarciański L.P.)},
 type={Text},
 URL={http://www.rcin.org.pl/Content/141097/PDF/KR038_167853_r1999-t55-no6_ChPO-Krupa-109-110.pdf},
 keywords={Chlidonias hybridus, Nadwarciański Park Krajobrazowy},
}