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wildfowl and wetlands trust
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Cold weather movements of waterfowl in western Europe
S. C. Ridgill, A. D. Fox, International Waterfowl and Wetlands Research Bureau, Wildfowl & Wetlands Trust · International Waterfowl and Wetlands Research Bureau
89 sayfa · 1990
Waterfowl / Migration / Wintering / Effect of cold on / Climatic factors