@misc{Dzięczkowski_Andrzej_(1932–_)_A_1967,
 author={Dzięczkowski, Andrzej (1932– )},
 volume={23 nowa seria},
 number={4},
 copyright={Creative Commons Attribution BY 3.0 PL license},
 address={Kraków},
 journal={Let's protect Our Indigenous Nature},
 howpublished={online},
 year={1967},
 publisher={Polish Academy of Sciences},
 publisher={Państwowe Wydawnictwo Naukowe},
 language={pol},
 type={Text},
 title={A breeding colony of the common heron in the Wielkopolski (Major Poland) National Park},
 URL={http://www.rcin.org.pl/Content/83563/PDF/KR038_104215_r1967-t23-no4_ChPO-Dzieczkowski-33-37.pdf},
 keywords={grey heron, Wielkopolski National Park, Ardea cinerea},
}