@misc{Boratyński_Adam_Alnus_1980,
 author={Boratyński, Adam},
 copyright={Creative Commons Attribution BY-SA 4.0 license},
 howpublished={online},
 year={1980},
 title={Alnus glutinosa (L.) Gaertn.},
 type={Image},
 URL={http://www.rcin.org.pl/Content/190830/PDF/KOR001_224753_1980_Alnus-glutinosa-L-.pdf},
 keywords={flower strukture, fruit structure, Betulaceae, Alnus glutinosa, alder},
}