Répertoire des noms génériques mentionnés dans l'Index kewensis et ses quinze premiers suppléments = Guide to the generic names appearing in the Index Kewensis and its fifteen supplements = Repertorio de los nombres genericos enumerados en el Index Kewensis y sus quince suplementos = Repertorium der im Index Kewensis und seinen fuenfzehn ersten Supplementen erwaehnten Gattungsnamen - Rouleau, Ernest 1916 -1991 (Châtelain, 1981)

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Report on the progress and condition of the United States National Museum - United States National Museum (U.S. Govt. Print. Off, 1928)

Report on the progress and condition of the United States National Museum - United States National Museum (U.S. Govt. Print. Off, 1929)

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Richardiana (Tropicalia, 2014)

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shuang zi ye zhi wu fen lei - Zhong hua jiao yu wen hua ji jin dong shi hui bian yi wei yuan hui 中华教育文化基金董事会编译委员会 (shang wu yin shu guan fa xing)

shuang zi ye zhi wu ke zhi - di de xun (ke xue chu ban she)

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SIDA, contributions to botany - Mahler, William F. (W. F. Mahler, etc.], 1996)