@misc{Vīksne_Jānis_(1936–_)_Some_1980,
 author={Vīksne, Jānis (1936– )},
 editor={Polska Akademia Nauk. Instytut Zoologii},
 editor={International Conference on the Study and Conservation of the Migratory Birds of the Baltic Basin (2 ; 1977 ; Sopot)},
 copyright={Rights Reserved - Restricted Access},
 address={Warszawa},
 journal={Acta Ornithologica},
 howpublished={online},
 year={1980},
 publisher={Państwowe Wydawnictwo Naukowe},
 language={eng},
 language={pol},
 language={rus},
 type={Text},
 title={Some problems in the black-headed gull Larus ridibundus research and the necessity of international cooperation in this respect},
 keywords={Black-headed Gull, international cooperation, congresses, problems, research, gulls, birds, Larus ridibundus, Laridae, Aves},
}