@misc{Witkowski_Zbigniew_The_1975,
 author={Witkowski, Zbigniew},
 volume={31},
 editor={Research Centre for the Protection of Nature of the Polish Academy of Sciences},
 number={1},
 copyright={Creative Commons Attribution BY 3.0 PL license},
 address={Warszawa},
 address={Kraków},
 journal={Let's protect Our Indigenous Nature},
 howpublished={online},
 year={1975},
 publisher={Państwowe Wydawnictwo Naukowe},
 language={pol},
 type={Text},
 title={The status and perspectives for a development of the network of national parks in Poland},
 URL={http://rcin.org.pl/Content/70688/PDF/KR038_91049_r1975-t31-no1_ChPO-Witkowski-8-18.pdf},
 keywords={national parks},
}