@misc{Olaczek_Romuald_Natural_1963,
 author={Olaczek, Romuald},
 volume={19 nowa seria},
 number={2},
 copyright={Creative Commons Attribution BY 3.0 PL license},
 address={Kraków},
 journal={Let's protect Our Indigenous Nature},
 howpublished={online},
 year={1963},
 publisher={Państwowe Wydawnictwo Naukowe},
 language={pol},
 type={Text},
 title={Natural relics in the valley of the upper Mroga},
 URL={http://www.rcin.org.pl/Content/80675/PDF/KR038_103134_r1963-t19-no2_ChPO-Olaczek-3-15.pdf},
}