@misc{Chałupka_Władysław_The_1975,
 author={Chałupka, Władysław and Giertych, Maciej},
 volume={20},
 editor={Polska Akademia Nauk. Instytut Dendrologii},
 copyright={Creative Commons Attribution BY-SA 4.0 license},
 journal={Arboretum Kórnickie},
 address={Poznań ; Warszawa},
 howpublished={online},
 year={1975},
 publisher={Państwowe Wydawnictwo Naukowe},
 language={mul},
 title={The effect of growth on cone crops in Norway spruce (Picea abies (L.) Karst.)},
 title={The effect of growth on cone crops in Norway spruce (Picea abies (L.) Karst.)},
 type={Text},
 URL={http://www.rcin.org.pl/Content/155643/PDF/KOR001_147003.pdf},
 keywords={Picea abies, Norway spruce, cone crops, growth of Norway spruce},
}