"Aythya ferina" - Selaus asiasanan mukaan Luonnonvarakeskuksen julkaisut
Viitteet 1-2 / 2
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Breeding sex ratios in two declining diving duck species: between-year variation and changes over six decades
Journal of Ornithology (Springer Berlin Heidelberg, 2019) -
Recent changes in the abundance of Common Pochard Aythya ferina breeding in Europe
Wildfowl (Wildfowl & Wetlands Trust, 2016)