@misc{Boratyński_Adam_Betulaceae_1980,
 author={Boratyński, Adam},
 copyright={Creative Commons Attribution BY-SA 4.0 license},
 howpublished={online},
 year={1980},
 title={Betulaceae - rodzaje: Alnus, Betula, Corylus, Carpinus, Ostrya i Ostryopsis},
 type={Image},
 URL={http://rcin.org.pl/Content/190521/PDF/KOR001_224806_1980_Betulaceae-rodzaje.pdf},
 keywords={floral diagram, Betulaceae, Alnus, Betula, Corylus, Carpinus, Ostrya, Ostryopsis},
}