Census methods for Murres, Uria species : a unified approach 1980 Birkhead, T. R. | Nettleship, David N. (D. N.) |
The birds of the Fraser River delta : populations, ecology and international significance 1987 Butler, Robert W. | Campbell, R. Wayne |
Population dynamics of the Common Loon (Gavia immer) associated with mercury-contaminated waters in northwestern Ontario 1986 Barr, J. F. |
The birds of the Creston Valley and southeastern British Columbia 1986 Butler, Robert W. | Stushnoff, Brian G. | McMackin, Edward |
The ring-billed gull in Ontario : a review of a new problem species 1986 Blokpoel, H. | Tessier, G. D. |