@misc{Erskine_Anthony_J._(1931–_)_A_1974, author={Erskine, Anthony J. (1931– )}, editor={Polska Akademia Nauk. Instytut Zoologii}, editor={Meeting of the International Bird Census Committee (4 ; 1972 ; Dziekanów Leśny)}, editor={Meeting of the European Ornithological Atlas Committee (2 ; 1972 ; Dziekanów Leśny)}, copyright={Rights Reserved - Restricted Access}, journal={Acta Ornithologica}, address={Warszawa}, howpublished={online}, year={1974}, publisher={Państwowe Wydawnictwo Naukowe}, language={eng}, language={pol}, language={rus}, type={Text}, title={A review of winter bird population studies in Canada}, keywords={birds, research, Canada, congresses, quantitative studies, winter studies, Aves}, }