@misc{_Opis_1959,
 editor={Polska Akademia Nauk. Zakład Dendrologii i Pomologii w Kórniku},
 copyright={Creative Commons Attribution BY-SA 4.0 license},
 howpublished={online},
 year={1959},
 language={pol},
 title={Opis drzewa doborowego. Klon K-09-},
 type={Text},
 URL={http://www.rcin.org.pl/Content/161517/PDF/KOR001_177144_Klon-09.pdf},
 keywords={plus trees, chosen tree, selection of trees, genetics of forest trees, register of plus trees, maple, Acer},
}