Document 1372
Robin, J.D.G. and W.W.H. Gunn. 1971. Whistling Swans near Wallaceburg, Ontario, Spring 1971. National Research Council Associate Committee on Bird Hazards to Aircraft Fieldnote 60. 28 pages.
Robin, J.D.G. and W.W.H. Gunn. 1971. Whistling Swans near Wallaceburg, Ontario, Spring 1971. National Research Council Associate Committee on Bird Hazards to Aircraft Fieldnote 60. 28 pages.
