@misc{_Acta_2007, volume={42}, editor={Museum and Institute of Zoology, Polish Academy of Sciences}, journal={Acta Ornithologica}, address={Warsaw}, howpublished={online}, year={2007}, publisher={Museum and Institute of Zoology, Polish Academy of Sciences}, publisher={Natura Optima Dux Foundation}, language={eng}, type={Text}, title={Acta Ornithologica, vol. 42 (2007)}, keywords={birds, Poland, ornithology, periodicals}, }