@misc{Engel_Jacek_Numbers_1988,
 author={Engel, Jacek and Majewski, Przemysław},
 volume={24},
 editor={Polska Akademia Nauk. Instytut Zoologii},
 editor={Państwowe Wydawnictwo Naukowe (1951–1992)},
 number={1},
 copyright={Rights Reserved - Restricted Access},
 address={Warszawa},
 journal={Acta Ornithologica},
 howpublished={online},
 year={1988},
 publisher={Państwowe Wydawnictwo Naukowe},
 language={eng},
 language={rus},
 language={pol},
 type={Text},
 title={Numbers and species of non-breeding geese in the Słońsk reserve},
 keywords={Grey-lag Goose, Graylag Goose, Greylag Goose, White-fronted Goose, Greater White-fronted Goose, Bean Goose, wintering, counting, Poland, Słońsk Nature Reserve, birds, Anser albifrons, Anser anser, Anser fabalis, Anatidae, Aves},
}