@misc{Jakubiec_Zbigniew_Zagęszczenie_1980,
 author={Jakubiec, Zbigniew},
 volume={R. 43},
 copyright={Creative Commons Attribution BY 3.0 PL license},
 address={Warszawa},
 address={Kraków},
 journal={Protection of Nature},
 howpublished={online},
 year={1980},
 publisher={Nature Protection Research Centre of the Polish Academy of Sciences},
 publisher={Państwowe Wydawnictwo Naukowe},
 language={pol},
 type={Text},
 title={Zagęszczenie i dynamika populacji lęgowej gawrona (Corvus frugilegus L.) w krajobrazie rolniczym Wielkopolski},
 title={The density and dynamics of the breeding population of the rook, Corvus frugilegus L. in an agricultural landscape of Major Poland},
 URL={http://rcin.org.pl/Content/120977/PDF/KR038_112761_r1980-r43_OP-Jakubiec-291-298.pdf},
 keywords={rook, Corvus frugilegus},
}