@misc{Boratyński_Adam_Betula_1980-1984, author={Boratyński, Adam}, copyright={Creative Commons Attribution BY-SA 4.0 license}, howpublished={online}, year={1980-1984}, title={Betula oycoviensis Besser}, type={Image}, URL={http://rcin.org.pl/Content/190612/PDF/KOR001_224078_1980-1984_Betula-oycow.pdf}, keywords={botanical drawings, birch}, }