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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, 1950)

Report on the scientific results of the voyage of H.M.S. Challenger during the years 1873-76 under the command of Captain George S. Nares ... and the late Captain Frank Tourle Thomson, R.N - Thomson, C. Wyville, Sir, (Charles Wyville), 1830 -1882 (Neill, 1885)

Report on the scientific results of the voyage of H.M.S. Challenger during the years 1873-76 under the command of Captain George S. Nares ... and the late Captain Frank Tourle Thomson, R.N - Thomson, C. Wyville, Sir, (Charles Wyville), 1830 -1882 (Neill, 1880)

Reportorio: de los tiempos, y historia natural desta Nueua Espana - Martínez, Enrico, 1632 (En la Emprenta del mesmo autor, 1606)

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The reptiles of western North America, an account of the species known to inhabit California and Oregon, Washington, Idaho, Utah, Nevada, Arizona, British Columbia, Sonora and Lower California - Van Denburgh, John, 1872 -1924 (California Academy of Sciences, 1922)

Die Reptilien und Amphibien von Madagascar / von Dr. phil. Oskar Boettger [With 3 supplements] - Boettger, O. (Oskar), 1844 -1910 (Christian Winter, 1881)

Researches, concerning the institutions & monuments of the ancient inhabitants of America : with descriptions & views of some of the most striking scenes in the Cordilleras! - Humboldt, Alexander von, 1769 -1859 (Published by Longman, Hurst, Rees, Orme & Brown, J. Murray & H. Colburn, 1814)

Researches concerning the institutions & monuments of the ancient inhabitants of America : with descriptions & views of some of the most striking scenes in the Cordilleras! - Humboldt, Alexander von, 1769 -1859 (Published by Longman, Hurst, Rees, Orme & Brown, J. Murray & H. Colburn, 1814)

Researches into the early history of Mankind and the development of Civilization - Tylor, Edward B. (Edward Burnett), 1832 -1917 (John Murray, 1865)

Retail price list : spring & summer, 1948 - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Fred & Myrtle's Cactus Gardens, 1948)

The Review of applied entomology Series A Agricultural - C.A.B. International. Bureau of Crop Protection (Commonwealth Agricultural Bureaux, etc, 1920)

Review of Myotis (Chiroptera, Vespertilionidae) from northern South America, including description of a new species - Moratelli, Ricardo (American Museum of Natural History, 2013)

Review of the status and conservation actions for CMS concerted action species - UNEP World Conservation Monitoring Centre. (UNEP-WCMC, CMS Secretariat, 2004)

Review of the World Heritage network: biogeography, habitats and biodiversity. Final draft - Chape, Stuart (UNEP-WCMC, IUCN, 2004)

Revised synonymic list of species in the genera Phanaeus MacLeay and Oxysternon Castelnau - Nevinson, B. G. (s.n, 1892)

Revisio generum plantarum:vascularium omnium atque cellularium multarum secundum leges nomenclaturae internationales cum enumeratione plantarum exoticarum in itinere mundi collectarum ... - Kuntze, Otto, 1843 -1907 (A. Felix [etc.], 1898)

Revision der unterfamilie der Orthalicinen - Strebel, Hermann, 1834 -1914 (Lucas Gräfe & Sillem, 1909)

A revision of species diversity in the neotropical genus Oreobates (Anura, Strabomantidae), with the description of three new species from the Amazonian slopes of the Andes - De La Riva, Ignacio (American Museum of Natural History, 2012)

A revision of the didelphid marsupial genus Marmosa Part 1 The species in Tate's 'mexicana' and 'mitis' sections and other closely related forms - Tate, G. H. H. (George Henry Hamilton), 1894 -1953 (American Museum of Natural History, 2010)

A revision of the South American species of Sigmodon (Mammalia, Muridae) : with notes on their natural history and biogeography - Voss, Robert S. (American Museum of Natural History, 1992)

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Revista chilena de historia natural - Museo de Historia Natural de Valparaíso (Valparaíso, Chile) (Litografia e Impr. Industrial (F. Peters), 1901)

Revista chilena de historia natural - Museo de Historia Natural de Valparaíso (Valparaíso, Chile) (Litografia e Impr. Industrial (F. Peters), 1907)

Revista chilena de historia natural - Museo de Historia Natural de Valparaíso (Valparaíso, Chile) (Litografia e Impr. Industrial (F. Peters), 1910)

Revista chilena de historia natural - Museo de Historia Natural de Valparaíso (Valparaíso, Chile) (Litografia e Impr. Industrial (F. Peters), 1913)

Revista chilena de historia natural - Museo de Historia Natural de Valparaíso (Valparaíso, Chile) (Litografia e Impr. Industrial (F. Peters), 1916)

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Revista de la Facultad de Agronomía y Veterinaria - Universidad Nacional de La Plata. Facultad de Agronomía y Veterinaria. (La Facultad, 1914)

Revista de la Real Academia de Ciencias Exactas, Físicas y Naturales de Madrid - Real Academia de Ciencias Exactas Físicas y Naturales de Madrid. (Real Academia de Ciencias Exactas, Físicas y Naturales de Madrid, 1914)

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Revista del Museo de La Plata - Universidad Nacional de La Plata. (Talleres del Museo de La Plata, 1898)

Revista del Museo de La Plata - Universidad Nacional de La Plata. (Talleres del Museo de La Plata, 1899)

Revista del Museo de La Plata - Universidad Nacional de La Plata. (Talleres del Museo de La Plata, 1902)

Revista del Museo de La Plata - Universidad Nacional de La Plata. (Talleres del Museo de La Plata, 1904)

Revista del Museo de La Plata - Universidad Nacional de La Plata. (Talleres del Museo de La Plata, 1905)

Revista del Museo de La Plata - Universidad Nacional de La Plata. (Talleres del Museo de La Plata, 1906)

Revista del Museo de La Plata - Universidad Nacional de La Plata. (Talleres del Museo de La Plata, 1908)

Revista del Museo de La Plata - Universidad Nacional de La Plata. (Talleres del Museo de La Plata, 1909)

Revista del Museo de La Plata - Universidad Nacional de La Plata. (Talleres del Museo de La Plata, 1910)

Revista del Museo de La Plata - Universidad Nacional de La Plata. (Talleres del Museo de La Plata, 1911)

Revista del Museo de La Plata - Universidad Nacional de La Plata. (Talleres del Museo de La Plata, 1915)

Revista del Museo de La Plata - Universidad Nacional de La Plata. (Talleres del Museo de La Plata, 1913)

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Revue suisse de zoologie - Muséum d'histoire naturelle de Genève. (Kundig [etc.], 1988)

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Rhodora - Robinson, Benjamin Lincoln, 1864 -1935 (New England Botanical Club [etc.], 1929)

Rhodora - Robinson, Benjamin Lincoln, 1864 -1935 (New England Botanical Club [etc.], 1939)

Rhodora - Robinson, Benjamin Lincoln, 1864 -1935 (New England Botanical Club [etc.], 1966)

Rhodora - Robinson, Benjamin Lincoln, 1864 -1935 (New England Botanical Club [etc.], 1982)

Rhodora - Robinson, Benjamin Lincoln, 1864 -1935 (New England Botanical Club [etc.], 1985)

The rhynchophora of America north of Mexico - LeConte, John L. (John Lawrence), 1825 -1883 (American Philosophical Society, 1876)

Rhynchota ... - Distant, William Lucas, 1845 -1922 (Taylor and Francis; [etc., etc.], 1918)

Richard Schomburgk's travels in British Guiana, 1840-1844 - Schomburgk, Richard, 1811 -1891 ("Daily Chronicle" Office, 1922)

Rivista di biologia (Università di Perugia, etc, 1919)

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Rodriguésia: Revista do Jardim Botânico do Rio de Janeiro (Instituto de Pesquisas Jardim Botânico do Rio de Janeiro, 1966)

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The royal natural history - Lydekker, Richard, 1849 -1915 (Frederick Warne & Co, 1893)

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The royal natural history - Lydekker, Richard, 1849 -1915 (F. Warne, 1893)

Rubber in Hawaii - Smith, Jared G. (Jared Gage), 1866 -1957 (Paradise of the Pacific Print, 1905)

Rural New Yorker - Moore, D. D. T. (Rural Pub. Co. [etc.], 1857)

Rural New Yorker - Moore, D. D. T. (Rural Pub. Co. [etc.], 1860)

Rural New Yorker - Moore, D. D. T. (Rural Pub. Co. [etc.], 1865)

Rural New Yorker - Moore, D. D. T. (Rural Pub. Co. [etc.], 1870)

Rural New Yorker - Moore, D. D. T. (Rural Pub. Co. [etc.], 1871)

Rural New Yorker - Moore, D. D. T. (Rural Pub. Co. [etc.], 1873)

Rural New Yorker - Moore, D. D. T. (Rural Pub. Co. [etc.], 1885)

Rural New Yorker - Moore, D. D. T. (Rural Pub. Co. [etc.], 1904)

Rural New Yorker - Moore, D. D. T. (Rural Pub. Co. [etc.], 1914)

Rural New Yorker - Moore, D. D. T. (Rural Pub. Co. [etc.], 1917)

Rural New Yorker - Moore, D. D. T. (Rural Pub. Co. [etc.], 1920)

Rural New Yorker - Moore, D. D. T. (Rural Pub. Co. [etc.], 1928)

Ruwenzori; an account of the expedition of H. R. H. Prince Luigi Amedeo of Savoy, Duke of the Abruzzi - Keane, A. H. (Augustus Henry), 1833 -1912 (Archibald Constable and Company Limited, 1908)

Ruwenzori; an account of the expedition of Prince Luigi Amedeo of Savoy, duke of Abruzzi - Keane, A. H. (Augustus Henry), 1833 -1912 (Dutton, 1908)

Ruwenzori : an account of the expedition of Prince Luigi Amedeo of Savoy, duke of the Abruzzi - Savoia, Luigi Amedeo di, duca degli Abruzzi, 1873 -1933 (Dutton, 1908)

Ryerson 1954 expansible orchid folder - vanda seedlings - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Daniel Ryerson, 1954)

Ryerson expansible orchid folder - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Daniel Ryerson, 1952)

Die säugethiere in zoologischer, anatomischer und palæontologischer beziehung umfassend dargestellt - Giebel, C. (Christoph), 1820 -1881 (A. Abel, 1885)

Saggio di algologia oceanica - Mazza, Angelo. (Tipografia del Seminario, 1905)

Saggio di algologia oceanica - Mazza, Angelo. (Tipografia del seminario, 1905)