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Article
Bulletin of the British Ornithologists' Club, 86(1)
Article
Wildfowl, 17(17)Six distinct types of drake Aythya hybrids which may be seen in Britain are described both from museum specimens and as seen in the field. These are the progeny of various combinations of four species: Pochard, Tufted Duck, Ferruginous Duck and [...]
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James M. Harrison 1964WAGBI Annual Report 1963-1964
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Bulletin of the British Ornithologists' Club, 83(6)
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Bulletin of the British Ornithologists' Club, 82(6)
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Bulletin of the British Ornithologists' Club, 82(3)
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Bulletin of the British Ornithologists' Club., 81(9)
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Bulletin of the British Ornithologists' Club., 81(6)
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Bulletin of the British Ornithologists' Club, 80(8)
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Bulletin of the British Ornithologists' Club., 80(2)
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James M. Harrison 1959Bulletin of the British Ornithologists' Club, 79(2)
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James M. Harrison 1959Bulletin of the British Ornithologists' Club, 79(8)
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Bulletin of the British Ornithologists' Club, 79(8)
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Bulletin of the British Ornithologists' Club, 78(6)
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Bulletin of the British Ornithologists' Club, 77(8)
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James M. Harrison 1957Bulletin of the British Ornithologists' Club, 77(8)
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Bulletin of the British Ornithologists' Club, 76(4)
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Bulletin of the British Ornithologists' Club, 76(2)
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Bulletin of the British Ornithologists' Club, 76(5)
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Bulletin of the British Ornithologists' Club, 76(8)
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James M. Harrison 1955Bulletin of the British Ornithologists' Club, 75(9)
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James M. Harrison 1954Bulletin of the British Ornithologists' Club, 74(5)
