@misc{_Acta_1987,
 volume={23},
 number={2},
 editor={Polska Akademia Nauk. Instytut Zoologii},
 copyright={Rights Reserved - Free Access},
 address={Warszawa},
 journal={Acta Ornithologica},
 howpublished={online},
 year={1987},
 publisher={Państwowe Wydawnictwo Naukowe},
 language={eng},
 language={pol},
 language={rus},
 title={Acta Ornithologica ; vol. 23, no 2 - Spis treści},
 type={Text},
 URL={http://rcin.org.pl/Content/41731/PDF/WA058_57179_P257-T23_Acta-Ornith-Nr-2-sp.pdf},
 keywords={Poland, birds, periodicals, ornithology},
}