@misc{Siwecki_Ryszard_A_1991,
 author={Siwecki, Ryszard},
 volume={34},
 editor={Polska Akademia Nauk. Instytut Dendrologii},
 copyright={Creative Commons Attribution BY-SA 4.0 license},
 journal={Arboretum Kórnickie},
 address={Poznań ; Warszawa},
 howpublished={online},
 year={1991},
 publisher={Wydawnictwo Naukowe PWN},
 language={mul},
 title={A decline of oak forests caused by abiotic and biotic factors and attempts at biological research on this syndrome},
 title={A decline of oak forests caused by abiotic and biotic factors and attempts at biological research on this syndrome},
 type={Text},
 keywords={Quercus, oak stands in the Krotoszyn Plateau, oak decline, biotic factors, abiotic factors},
}