@misc{_Acta_1989,
 editor={Polska Akademia Nauk. Instytut Zoologii},
 journal={Acta Ornithologica},
 address={Warszawa},
 howpublished={online},
 year={1989},
 publisher={Państwowe Wydawnictwo Naukowe},
 language={pol},
 language={eng},
 language={rus},
 title={Acta Ornithologica, vol. 25 (1989)},
 type={Text},
 keywords={ornithology, birds, Poland, periodicals},
}