@misc{_Let’s_1957,
 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},
 title={Let’s protect Our Indigenous Nature Vol. 13 issue 4 (1957)},
 type={Text},
}