@misc{Hrynkiewicz-Sudnik_Jerzy_Variability_1962,
 author={Hrynkiewicz-Sudnik, Jerzy},
 volume={7},
 editor={Polska Akademia Nauk. Zakład Dendrologii i Pomologii w Kórniku},
 editor={Polska Akademia Nauk. Instytut Dendrologii},
 copyright={Creative Commons Attribution BY-SA 4.0 license},
 address={Poznań ; Warszawa},
 journal={Arboretum Kórnickie},
 howpublished={online},
 year={1962},
 publisher={Państwowe Wydawnictwo Naukowe},
 language={mul},
 type={Text},
 title={Variability and Distribution of Betula obscura Kot. in Poland},
 keywords={Betula obscura, geographical distribution in Poland},
}