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Published in Palaeontology, in 1963, in volume 6, issue 1, pages 70-82
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Published in Palaeontology, in 1963, in volume 6, issue 1, pages 1-11
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Published in Palaeontology, in 1965, in volume 8, issue 1, pages 5-10
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Published in Bulletin of The British Ornithologists' Club, in 1966, in volume 86, pages 86-94
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Published in Bulletin of The British Ornithologists' Club, in 1966, in volume 86, pages 148-159
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Published in Madroño, in 1990, in volume 37, issue 1, pages 60-65
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Published in The Wilson Bulletin, in 1994, in volume 106, issue 2, pages 272-288
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Published in Asa Gray correspondence. Senders Be-Bo, in 1887, pages 1-2
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