@misc{Pinowski_Jan_Factors_1959,
 author={Pinowski, Jan},
 volume={7},
 editor={Polska Akademia Nauk. Komitet Ekologiczny},
 number={16},
 copyright={Creative Commons Attribution BY 3.0 PL license},
 address={Warszawa},
 journal={Ekologia Polska. Seria A},
 howpublished={online},
 year={1959},
 publisher={Państwowe Wydawnictwo Naukowe},
 language={eng},
 type={Text},
 title={Factors influencing the number of feeding rooks (Corvus frugilegus frugilegus L.) in various field environments},
 URL={http://rcin.org.pl/Content/67886/PDF/WA058_85853_P2840-T7_Eko-Pol-A-Nr-15.pdf},
 keywords={rook, populations, Poland, Warsaw, Corvus frugilegus},
}