@misc{_Acta_1996,
 volume={31},
 editor={Polska Akademia Nauk. Muzeum i Instytut Zoologii},
 number={2},
 address={Warszawa},
 journal={Acta Ornithologica},
 howpublished={online},
 year={1996},
 publisher={Muzeum i Instytut Zoologii PAN},
 language={pol},
 language={eng},
 language={rus},
 type={Text},
 title={Acta Ornithologica, vol. 31 no 2 (1996)},
 keywords={ornithology, birds, Poland, periodicals},
}