@misc{Herbich_Jacek_Problem_1975,
 author={Herbich, Jacek},
 volume={R. 40},
 copyright={Creative Commons Attribution BY 3.0 PL license},
 address={Warszawa},
 address={Kraków},
 journal={Protection of Nature},
 howpublished={online},
 year={1975},
 publisher={Nature Protection Research Centre of the Polish Academy of Sciences},
 publisher={Państwowe Wydawnictwo Naukowe},
 language={pol},
 title={Problem zachowania rezerwatów leśnych w okolicach Opalenia nad dolną Wisłą},
 title={Problem of preservation of forest reserves near Opalenie on the Lower Vistula},
 type={Text},
 URL={http://rcin.org.pl/Content/152177/PDF/KR038_112398_r1975-r40_OP-Herbich-113-138.pdf},
}