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Published in Rhodora, in 1902, in volume 4, issue 38, pages 23-26
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Published in Rhodora, in 1902, in volume 4, issue 39, pages 60-61
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Published in Rhodora, in 1931, in volume 33, issue 394, pages 207-209
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Published in Rhodora, in 1916, in volume 18, issue 214, pages 205-212
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Published in Journal of Raptor Research, in 2005, in volume 39, issue 3, pages 222-228
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Published in Annals of The South African Museum, in 1980, in volume 82, pages 293-320
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Published in Madroño, in 1931, in volume 2, issue 2, pages 17
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Published in Novon, in 1999, in volume 9, pages 61-65
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