@misc{Dutkiewicz_Jacek_1957,
 author={Dutkiewicz, Jacek},
 volume={13 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={1957},
 publisher={Państwowe Wydawnictwo Naukowe},
 language={pol},
 type={Text},
 URL={http://rcin.org.pl/Content/80649/PDF/KR038_103072_r1957-t13-no4_ChPO-Dutkiewicz-51.pdf},
 keywords={Kampinos National Park},
}