@misc{Środoń_Andrzej_(1908–1998)_Birch_1979,
 author={Środoń, Andrzej (1908–1998)},
 volume={7},
 editor={Białobok, Stefan. Redaktor},
 editor={Polska Akademia Nauk. Instytut Dendrologii},
 copyright={Creative Commons Attribution BY-SA 4.0 license},
 address={Warszawa-Poznań},
 journal={Nasze drzewa leśne},
 howpublished={online},
 year={1979},
 publisher={Państwowe Wydawnictwo Naukowe},
 language={pol},
 type={Text},
 title={Birch in the Tertiary and Quaternary eras},
 URL={http://rcin.org.pl/Content/161530/PDF/KOR001_153959_1979_Brzoza-w-minionych-c.pdf},
 keywords={Betula, history of birch, paleobotany},
}