@misc{Browicz_Kazimierz_Forms_1975,
 author={Browicz, Kazimierz and Zieliński, Jerzy},
 volume={20},
 editor={Polska Akademia Nauk. Instytut Dendrologii},
 copyright={Creative Commons Attribution BY-SA 4.0 license},
 address={Poznań ; Warszawa},
 journal={Arboretum Kórnickie},
 howpublished={online},
 year={1975},
 publisher={Państwowe Wydawnictwo Naukowe},
 language={mul},
 title={Forms of blackthorn (Prunus spinosa L.) with coloured flowers growing in Poland},
 type={Text},
 URL={http://www.rcin.org.pl/Content/155638/PDF/KOR001_146997.pdf},
 keywords={Prunus spinosa, blackthorn, occurrence in Poland},
}