@misc{Boratyński_Adam_Ostrya_1980,
 author={Boratyński, Adam},
 copyright={Creative Commons Attribution BY-SA 4.0 license},
 howpublished={online},
 year={1980},
 type={Image},
 title={Ostrya virginiana (Mill.) K. Koch},
 URL={http://rcin.org.pl./Content/190590/PDF/KOR001_224752_1980_Ostrya-virginiana-M.pdf},
 keywords={flower strukture, fruit structure, Betulaceae, Ostrya virginiana, American hophornbeam},
}