Published in Annals of The Transvaal Museum, in 1909, in volume 1, issue 3, pages 183-194

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Published in Annals of The Transvaal Museum, in 1908, in volume 1, issue 1, pages 71-72

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Published in Annals of The Transvaal Museum, in 1908, in volume 1, issue 1, pages 64

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Published in Zoologische Jahrbücher. Abteilung für Systematik, Geographie und Biologie der Tiere, in 1903, in volume 17, pages 457-468

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Published in Annals of The Transvaal Museum, in 1908, in volume 1, issue 1, pages 62-63

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Published in Annals of The Transvaal Museum, in 1908, in volume 1, issue 1, pages 17-45

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Published in Transactions of the Royal Society of South Africa, in 1910, in volume 1, issue 2, pages 343-345

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Published in Torreya, in 1928, in volume 28, issue 1, pages 13-14

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Published in Quarterly journal of microscopical science, in 1911, in volume 56, issue 222, pages 317-385

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Published in Madroño, in 1955, in volume 13, issue 3, pages 102-107

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Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1880, in volume 32, pages 278-279

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Published in Jour Washington Acad Sci, in 1954, in volume 44, pages 356-357

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Published in Journal of The Asiatic Society of Bengal, in 1879, in volume 48, issue IV, pages 253-257

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Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1880, in volume 32, pages 281

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Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1880, in volume 32, pages 244-251

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Published in Journal für Ornithologie, in 1903, in volume 51, pages 257-258

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Published in Proceedings of The American Philosophical Society, in 1882, in volume 20, issue 111, pages 112-117

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Published in Journal of South African Botany, in 1981, in volume 47, issue 2, pages 135-146

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Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1880, in volume 32, pages 282-291

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Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1880, in volume 32, pages 296-309

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Published in Rhodora, in 1978, in volume 80, issue 824, pages 528-544

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Published in Bulletin of The British Ornithologists' Club, in 1980, in volume 100, pages 208-212

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Published in Phytologia, in 1981, in volume 47, issue 5, pages 389-391

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Published in Zool. Anz., in 1902, in volume 25, pages 645-647

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Published in Annals of the South African Museum, in 1965, in volume 48, issue 9, pages 195-210

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Published in Asa Gray correspondence. Senders Be-Bo, in 1830, pages 1-3

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Published in Asa Gray correspondence. Senders Be-Bo, in 1831, pages 1-3

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Published in Bulletin of The African Bird Club, in 2014, in volume 21, issue 2, pages 220-221

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Published in Madroño, in 1953, in volume 12, issue 2, pages 33-39

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Published in Annals of The South African Museum, in 1967, in volume 48, pages 523-548

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Published in Annals of the Missouri Botanical Garden, in 1966, in volume 53, pages 258-259

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Published in Asa Gray correspondence. Senders Ga-Go, 1835-1891 (inclusive), in 1858, pages 1-2

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Published in Asa Gray correspondence. Senders Ga-Go, 1835-1891 (inclusive), in 1859, pages 1-2

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Published in Asa Gray correspondence. Senders Ga-Go, 1835-1891 (inclusive), in 1882, pages 1-2

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Published in Asa Gray correspondence. Senders Ga-Go, 1835-1891 (inclusive), in 1857, pages 1

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Published in Asa Gray correspondence. Senders Ga-Go, 1835-1891 (inclusive), in 1858, pages 1-3

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Published in Asa Gray correspondence. Senders Ga-Go, 1835-1891 (inclusive), in 1858, pages 1-4

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Published in Asa Gray correspondence. Senders Ga-Go, 1835-1891 (inclusive), in 1883, pages 1-2

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Published in Asa Gray correspondence. Senders Ga-Go, 1835-1891 (inclusive), in 1857, pages 1-2

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Published in Asa Gray correspondence. Senders Ga-Go, 1835-1891 (inclusive), in 1857, pages 1-2

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Published in Asa Gray correspondence. Senders Ga-Go, 1835-1891 (inclusive), in 1882, pages 1-2

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Published in Asa Gray correspondence. Senders Ga-Go, 1835-1891 (inclusive), in 1882, pages 1-2

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Published in Asa Gray correspondence. Senders Ga-Go, 1835-1891 (inclusive), in 1842, pages 1-3

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Published in Asa Gray correspondence. Senders Ga-Go, 1835-1891 (inclusive), in 1855, pages 1-2

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Published in Asa Gray correspondence. Senders Ga-Go, 1835-1891 (inclusive), in 1857, pages 1-2

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Published in Asa Gray correspondence. Senders Ga-Go, 1835-1891 (inclusive), in 1857, pages 1-4

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Published in Asa Gray correspondence. Senders Ga-Go, 1835-1891 (inclusive), in 1857, pages 1-2

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Published in Asa Gray correspondence. Senders Ga-Go, 1835-1891 (inclusive), in 1850, pages 1-2

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Published in Nautilis, in 1926, in volume 39, pages 140-141

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Published in Bulletin of The British Ornithologists' Club, in 2008, in volume 128, issue 4, pages 242-253

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