@misc{Czekalski_Mieczysław_The_1974,
 author={Czekalski, Mieczysław},
 volume={30},
 number={3-4},
 editor={Research Centre for the Protection of Nature of the Polish Academy of Sciences},
 copyright={Creative Commons Attribution BY 3.0 PL license},
 address={Warszawa},
 address={Kraków},
 journal={Let's protect Our Indigenous Nature},
 howpublished={online},
 year={1974},
 publisher={Państwowe Wydawnictwo Naukowe},
 language={pol},
 title={The alley formed ashes of mountain, Sorbus intermedia, in the province of Zielona Góra deserves protection},
 type={Text},
 URL={http://www.rcin.org.pl/Content/80713/PDF/KR038_99351_r1974-t30-no3-4_ChPO-Czekalski-73-76.pdf},
 keywords={mountain ash, Sorbus intermedia},
}