@misc{Chałupka_Władysław_Flowering_1991,
 author={Chałupka, Władysław},
 volume={33},
 editor={Polska Akademia Nauk. Instytut Dendrologii},
 copyright={Creative Commons Attribution BY-SA 4.0 license},
 address={Poznań ; Warszawa},
 journal={Arboretum Kórnickie},
 howpublished={online},
 year={1991},
 publisher={Wydawnictwo Naukowe PWN},
 language={mul},
 type={Text},
 title={Flowering and mortality of grafts in a Norway spruce (Picea abies (L.) Karst.) seed orchard in Kórnik},
 URL={http://www.rcin.org.pl/Content/156766/PDF/KOR001_148814.pdf},
 keywords={Picea abies, Norway spruce seed orchard in Kórnik, periodicity of flowering, clonal variation},
}