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Article
Bulletin of the British Ornithologists' Club, 86(1)
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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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J.M. Harrison ; Jeffery G. Harrison 1965Bulletin of the British Ornithologists' Club, 85(6)
Congrès
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Bulletin of the British Ornithologists' Club, 83(2)
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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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Jeffery G. Harrison 1961Bulletin of the British Ornithologists' Club, 81(1)
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Bulletin of the British Ornithologists' Club., 81(6)
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Jeffery G. Harrison 1960Bulletin of the British Ornithologists' Club, 80(9)
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Bulletin of the British Ornithologists' Club, 80(8)
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Jeffery G. Harrison ; Peter Olney 1960Bulletin of the British Ornithologists' Club, 80(3)
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Jeffery G. Harrison 1960Wildfowl, 11(11)In July, 1957, Dr. Geoffrey Matthews and I published an article on 'Duck Viscera for Scientific Research' in the Shooting Times for the benefit of wildfowlers, who were to supply the basic material for the proposed food and parasitic surveys of [...]
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Bulletin of the British Ornithologists' Club, 80(3)
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Bulletin of the British Ornithologists' Club., 80(2)
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Jeffery G. Harrison 1959Bulletin of the British Ornithologists' Club, 79(2)
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Bulletin of the British Ornithologists' Club, 79(8)
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Bulletin of the British Ornithologists' Club, 79(2)
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J.M. Harrison ; Jeffery G. Harrison 1959Bulletin of The British Ornithologists' Club, 79(5)
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Jeffery G. Harrison 1958Bulletin of the British Ornithologists' Club, 78(8)
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Bulletin of the British Ornithologists' Club, 78(2)
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Bulletin of the British Ornithologists' Club, 78(6)
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Jeffery G. Harrison 1957Bulletin of the British Ornithologists' Club, 77(9)
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Jeffery G. Harrison 1957Bulletin of the British Ornithologists' Club, 77(2)
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Bulletin of the British Ornithologists' Club, 77(8)
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Bulletin of the British Ornithologists' Club, 76(4)
