@misc{Witt_Klaus_On_1997,
 author={Witt, Klaus},
 volume={32},
 editor={Polska Akademia Nauk. Muzeum i Instytut Zoologii},
 editor={International Conference on Magpie Ecology (1 ; 1995 ; Zielona Góra)},
 number={1},
 copyright={Rights Reserved - Restricted Access},
 address={Warszawa},
 journal={Acta Ornithologica},
 howpublished={online},
 year={1997},
 publisher={Muzeum i Instytut Zoologii PAN},
 language={eng},
 language={pol},
 type={Text},
 title={On the abundance of magpie Pica pica during breeding and winter season in Berlin},
 keywords={Magpie, counting, reproduction, Germany, Berlin, congresses, breeding abundance, winter abundance, population changes, birds, Pica pica, Corvidae, Aves},
}