@misc{Tryjanowski_Piotr_The_1991,
 author={Tryjanowski, Piotr},
 volume={47},
 number={5},
 copyright={Creative Commons Attribution BY 3.0 PL license},
 journal={Let's protect Our Indigenous Nature},
 address={Kraków},
 howpublished={online},
 year={1991},
 publisher={Research Centre for the Protection of Nature and Natural Resources of the Polish Academy of Sciences},
 language={pol},
 title={The section of the Obra river valley in the province of Zielona Góra (The Green Mtns) deserves to be protected},
 type={Text},
 URL={http://www.rcin.org.pl/Content/86414/PDF/KR038_105141_r1991-t47-no5_ChPO-Tryjanowski-112-114.pdf},
}