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Published in The Auk, in 1906, in volume 23, pages 318-334

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Published in The Auk, in 1907, in volume 24, pages 53-70

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Published in The Auk, in 1904, in volume 21, pages 255-259

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Published in Botanical Gazette, in 1888, in volume 13, issue 7, pages 193

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Published in Botanical Gazette, in 1882, in volume 7, issue 10, pages 122

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Published in Bulletin of The British Ornithologists' Club, in 1986, in volume 106, pages 84-86

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Published in Biol Bull, in 1934, in volume 66, pages 316-325

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Published in The Auk, in 1907, in volume 24, pages 357

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