@misc{Jentys-Szaferowa_Janina_Morphology,_1979,
 author={Jentys-Szaferowa, Janina},
 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={Morphology, systematics and variability of polish tree birches},
 keywords={Betula, birch, morphology, systematics, variability},
}