@misc{_Acta_2007, volume={42}, number={2}, editor={Museum and Institute of Zoology, Polish Academy of Sciences}, copyright={Rights Reserved - Free Access}, address={Warsaw}, journal={Acta Ornithologica}, howpublished={online}, year={2007}, publisher={Museum and Institute of Zoology, Polish Academy of Sciences}, publisher={Natura Optima Dux Foundation}, language={eng}, title={Acta Ornithologica, Winter 2007 - Vol. 42 No 2}, type={Text}, keywords={Poland, birds, periodicals, ornithology}, }