@misc{_Acta_1961,
 editor={Polska Akademia Nauk. Instytut Zoologiczny},
 address={Warszawa},
 address={(Wrocław)},
 journal={Acta Ornithologica},
 howpublished={online},
 year={1961},
 publisher={Państwowe Wydawnictwo Naukowe},
 publisher={(Wrocławska Drukarnia Naukowa)},
 language={eng},
 language={pol},
 language={rus},
 language={ger},
 title={Acta Ornithologica, t. 6 nr 4 (1961)},
 type={Text},
 keywords={Poland, birds, periodicals, ornithology},
}