@misc{_Acta_1980-1981,
 editor={Polska Akademia Nauk. Instytut Zoologii},
 address={Warszawa},
 journal={Acta Ornithologica},
 howpublished={online},
 year={1980-1981},
 publisher={Państwowe Wydawnictwo Naukowe},
 language={eng},
 language={pol},
 language={rus},
 title={Acta Ornithologica, t. 18 (1980-1981)},
 type={Text},
 URL={http://rcin.org.pl/miiz/Content/27117/PDF/WA058_31688_P257-T18_Acta-Ornith-Spis-t18.pdf},
 keywords={Poland, birds, periodicals, ornithology},
}