@misc{_Acta_1975-1976, editor={Polska Akademia Nauk. Instytut Zoologii}, editor={Polska Akademia Nauk. Instytut Zoologii}, address={Warszawa}, journal={Acta Ornithologica}, howpublished={online}, year={1975-1976}, year={1975-1976}, publisher={Państwowe Wydawnictwo Naukowe}, publisher={Państwowe Wydawnictwo Naukowe}, language={eng}, language={pol}, language={rus}, type={Text}, title={Acta Ornithologica ; t. 15}, title={Acta Ornithologica, t. 15 (1975-1976)}, keywords={Poland, birds, periodicals, ornithology}, }