@misc{Staszkiewicz_Jerzy_Systematics_1977,
 author={Staszkiewicz, Jerzy},
 volume={5},
 editor={Białobok, Stefan. Redaktor},
 editor={Polska Akademia Nauk. Instytut Dendrologii},
 copyright={Creative Commons Attribution BY-SA 4.0 license},
 journal={Nasze drzewa leśne},
 address={Warszawa-Poznań},
 howpublished={online},
 year={1977},
 publisher={Państwowe Wydawnictwo Naukowe},
 language={pol},
 title={Systematics},
 type={Text},
 keywords={Picea abies, Norway spruce, systematics of Norway spruce},
}