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Published in Bulletin of The British Ornithologists' Club, in 1963, in volume 83, pages 25-29
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Published in Bulletin of The British Ornithologists' Club, in 1968, in volume 88, pages 30-31
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Published in Bulletin of The British Ornithologists' Club, in 1943, in volume 63, pages 63-64
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Published in Bulletin of The British Ornithologists' Club, in 1967, in volume 87, pages 61
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Published in Nautilis, in 1926, in volume 40, pages 49-52
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Published in Western Australian Naturalist, in 1948, in volume 1, issue 7, pages 136-138
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Published in Madroño, in 1932, in volume 2, issue 7, pages 57
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HUNTING RANGE AND STRATEGIES IN A TUNDRA BREEDING PEREGRINE AND GYRFALCON OBSERVED FROM A HELICOPTER
Published in Journal of Raptor Research, in 1991, in volume 25, issue 3, pages 49-62
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Published in Jour Bombay Nat Hist Soc, in 1942, in volume 43, issue 3, pages 488-493
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Published in Quarterly Journal of The Florida Academy of Sciences, in 1959, in volume 22, pages 76-77
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Published in Entomological News, in 1985, in volume 96, pages 49-52
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Published in The Wilson Bulletin, in 1916, in volume 28, issue 1, pages 18-25
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Published in Journal of The Bombay Natural History Society, in 1971, in volume 68, issue 3, pages 823
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Published in Annals And Magazine of Natural History, in 1869, in volume 3, pages 399-400
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Published in Forktail, in 1987, in volume 3, pages 68-69
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