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Published in American Fern Journal, in 2012, in volume 102, pages 256-272

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Published in Gardens' Bulletin, Singapore, in 1994, in volume 46, issue 2, pages 138-140

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Published in Gardens' Bulletin, Singapore, in 2011, in volume 63, issue 1, pages 137-144

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Published in The Gardens' Bulletin Singapore, in 1998, in volume 50, issue 1998, pages 151-160

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Published in Phytologia, in 1968, in volume 17, pages 353-366

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Published in PHYTOLOGIA, in 1967, in volume 15, issue 4, pages 272-288

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Published in Gardens' Bulletin Singapore, in 2002, in volume 54, issue 2, pages 263-286

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Published in Veliger, in 1987, in volume 30, pages 24-39

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Published in Novon, in 1994, in volume 4, pages 94-97

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Published in Sida, Contributions To Botany, in 1994, in volume 16, issue 1, pages 23-31

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Published in Veliger, in 1985, in volume 27, pages 331-335

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Published in Gardens' Bulletin Singapore, in 2010, in volume 62, issue 1, pages 211-212

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Published in Sida, Contributions To Botany, in 1991, in volume 14, issue 3, pages 411-420

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Published in Sida, Contributions To Botany, in 1997, in volume 17, issue 4, pages 833-836

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Published in Gardens' Bulletin, Singapore, in 2003, in volume 55, issue 1, pages 239-256

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Published in Mémoires du Muséum National d'Histoire Naturelle. Série A, Zoologie, in 1982, in volume 123, issue 1, pages 123-127

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Published in Journal of The Washington Academy of Sciences, in 1955, in volume 45, issue 7, pages 210-216

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Published in Madroño, in 1999, in volume 46, issue 4, pages 187-198

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Published in Journal of The Asiatic Society of Bengal, in 1840, in volume 8, issue 91, pages 551-552

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Published in Sida, Contributions To Botany, in 1997, in volume 17, issue 4, pages 667-675

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Published in Journal of The New York Entomological Society, in 1986, in volume 94, issue 3, pages 442-443

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Published in Bulletin of Zoological Nomenclature, in 1973, in volume 30, pages 42-46

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Published in Biol Bull, in 1984, in volume 167, pages 322-330

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Published in Proceedings of the Entomological Society of Washington, in 1986, in volume 88, pages 354-359

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Published in Proceedings of the Entomological Society of Washington, in 1984, in volume 86, pages 305-311

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Published in Gardens' Bulletin Singapore, in 2012, in volume 64, issue 1, pages 277-278

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Published in Malacologia, in 2008, in volume 50, issue 1, pages 279-292

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Published in Malacologia, in 2006, in volume 48, issue 1-2, pages 65-76

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Published in Bulletin of Zoological Nomenclature, in 1992, in volume 49, issue 2, pages 127-128

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Published in The Auk, in 1919, in volume 36, pages 600-601

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Published in Nautilis, in 1923, in volume 36, pages 103-104

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Published in Discovery reports, in 1936, in volume 12, pages 59-193

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Published in Scopus, in 1977, in volume 1, pages 84-86

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Published in The Auk, in 1914, in volume 31, pages 415

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Published in Asa Gray correspondence. Senders E, 1838-1898 (inclusive), in 1858, pages 1-3

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Published in Asa Gray correspondence. Senders E, 1838-1898 (inclusive), in 1859, pages 1-3

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Published in Asa Gray correspondence. Senders E, 1838-1898 (inclusive), pages 1

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Published in Asa Gray correspondence. Senders E, 1838-1898 (inclusive), in 1860, pages 1-3

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Published in Asa Gray correspondence. Senders E, 1838-1898 (inclusive), in 1854, pages 1-5

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Published in Asa Gray correspondence. Senders E, 1838-1898 (inclusive), in 1854, pages 1-2

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Published in Asa Gray correspondence. Senders E, 1838-1898 (inclusive), in 1854, pages 1

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Published in Asa Gray correspondence. Senders E, 1838-1898 (inclusive), in 1857, pages 1-2

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