Report of the United States Geological Survey of the territories - Lesquereux, Léo, 1806 -1889 (Govt. Print. Off, 1873)

Report of the United States National Museum - United States National Museum (U.S. Govt. Print. Off, 1886)

Report on the progress and condition of the United States National Museum - United States National Museum (U.S. Govt. Print. Off, 1924)

Report on the progress and condition of the United States National Museum - United States National Museum (U.S. Govt. Print. Off, 1926)

Report on the progress and condition of the United States National Museum - United States National Museum (U.S. Govt. Print. Off, 1935)

Report upon the extinct Vertebrata obtained in New Mexico by parties of the expedition of 1874 - Cope, E. D. (Edward Drinker), 1840 -1897 (1877)

Report upon United States Geographical surveys west of the one hundredth meridian - Geographical Surveys West of the 100th Meridian (U.S.) (G.P.O, 1877)

Report upon United States Geographical surveys west of the one hundredth meridian - Geographical Surveys West of the 100th Meridian (U.S.) (G.P.O, 1878)

Reports of explorations and surveys, to ascertain the most practicable and economical route for a railroad from the Mississippi River to the Pacific Ocean - Baird, Spencer Fullerton, 1823 -1887 (A.O.P. Nicholson, Printer [etc.], 1855)

Reports of explorations and surveys, to ascertain the most practicable and economical route for a railroad from the Mississippi River to the Pacific Ocean - Baird, Spencer Fullerton, 1823 -1887 (A.O.P. Nicholson, Printer [etc.], 1857)

Reports of explorations and surveys, to ascertain the most practicable and economical route for a railroad from the Mississippi River to the Pacific Ocean - Baird, Spencer Fullerton, 1823 -1887 (A.O.P. Nicholson, Printer [etc.], 1853)

Reports of the Princeton University Expeditions to Patagonia, 1896-1899. J. B. Hatcher in charge - Princeton University Expeditions to Patagonia 1896 -1899 (The University, 1912)

Reports of the Princeton University Expeditions to Patagonia, 1896-1899. J. B. Hatcher in charge - Princeton University Expeditions to Patagonia 1896 -1899 (The University, 1910)

Reports on zoology for 1843, 1844 - Ray Society. (Printed for the Ray society, 1847)

The reproductive process: its histology, physiology, and pathology. Demonstrating the unity of the anatomical type of the placenta in all the Mammalia, and the physiological unity of the nutrition of the fœtus in all the vertebrates. In two volumes: one a quarto atlas of illustrations, engraved by Bettini, and reproduced by the heliotype process. Tr. by Henry O. Marcy ... - Ercolani, G. B. (Giovanni Battista), 1819 -1883 (Houghton, Mifflin and company, 1884)

Western Australian Herbarium Research Notes - Western Australia. Department of Biodiversity, Conservation; Attractions (Western Australian Herbarium, 1981)

Retail catalogue : garden seeds - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Sioux City Seed and Nursery Co, 1902)

Retail seed catalogue - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Sioux City Nursery and Seed Company, 1897)

Return / British Museum - British Museum (Natural History) (British Museum, 1811)

Return / British Museum - British Museum (Natural History) (British Museum, 1856)

Return / British Museum - British Museum (Natural History) (British Museum, 1890)

Return / British Museum - British Museum (Natural History) (British Museum, 1891)

Return / British Museum - British Museum (Natural History) (British Museum, 1896)

Return / British Museum - British Museum (Natural History) (British Museum, 1901)

Return / British Museum - British Museum (Natural History) (British Museum, 1906)

Return / British Museum - British Museum (Natural History) (British Museum, 1911)

Return / British Museum - British Museum (Natural History) (British Museum, 1916)

Return / British Museum - British Museum (Natural History) (British Museum, 1925)

Review of the Pleistocene of Europe, Asia and Northern Africa - Osborn, Henry Fairfield, 1857 -1935 (New York Academy of Sciences, 1915)

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Revised list of the vertebrated animals now or lately living in the gardens of the Zoological society of London. 1872 - Sclater, Philip Lutley, 1829 -1913 (Printed for the Society, 1872)

A revision of Centronycteris Gray (Chiroptera, Emballonuridae) with notes on natural history - Simmons, Nancy B. (American Museum of Natural History, 1998)

Revista chilena de historia natural - Museo de Historia Natural de Valparaíso (Valparaíso, Chile) (Litografia e Impr. Industrial (F. Peters), 1904)

Revue critique de paléozoologie et de paléophytologie (M. Cossman, 1897)

Revue critique de paléozoologie - Cossmann, M. (Maurice), 1850 -1924 (M. Cossmann, 1902)

Revue critique de paléozoologie - Cossmann, M. (Maurice), 1850 -1924 (M. Cossmann, 1909)

Revue critique de paléozoologie - Cossmann, M. (Maurice), 1850 -1924 (M. Cossmann, 1915)

Revue d'entomologie - Société française d'entomologie. (Société Française d'Entomologie, 1887)

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Revue générale des sciences pures et appliquées ([s.n.], 1895)

Revue générale des sciences pures et appliquées ([s.n.], 1919)

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Revue suisse de zoologie - Muséum d'histoire naturelle de Genève. (Kundig [etc.], 1968)

Revue suisse de zoologie - Muséum d'histoire naturelle de Genève. (Kundig [etc.], 1972)

Revue suisse de zoologie - Muséum d'histoire naturelle de Genève. (Kundig [etc.], 1974)

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

Revue zoologique - Société Cuvierienne. (Société cuvierienne, 1839)

Revue zoologique - Société Cuvierienne. (Société cuvierienne, 1840)

Revue zoologique africaine (Hayez, 1916)

R.H. Shumway's 1934 catalog, the pioneer American seedsman special offer - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (R.H. Shumway, 1934)

R.H. Shumway's 1935 catalog, the pioneer American seedsman special offer - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (R.H. Shumway, 1935)

R.H. Shumway's 1936 catalog, the pioneer American seedsman special offer - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (R.H. Shumway, 1936)

R.H. Shumway's 1937 catalog, the pioneer American seedsman special offer - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (R.H. Shumway, 1937)

R.H. Shumway's 1938 catalog, the pioneer American seedsman - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (R.H. Shumway, 1938)

Rhinocerotidae from the Middle Miocene of the Tung-gur Formation, Inner Mongolia (China) - Cerdeño, Esperanza (American Museum of Natural History, 1996)

Rhodora - Robinson, Benjamin Lincoln, 1864 -1935 (New England Botanical Club [etc.], 1926)

Rhodora - Robinson, Benjamin Lincoln, 1864 -1935 (New England Botanical Club [etc.], 1932)

Rhodora - Robinson, Benjamin Lincoln, 1864 -1935 (New England Botanical Club [etc.], 1934)

Rhodora - Robinson, Benjamin Lincoln, 1864 -1935 (New England Botanical Club [etc.], 1938)

Rhodora - Robinson, Benjamin Lincoln, 1864 -1935 (New England Botanical Club [etc.], 1953)

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

Rhodora - Robinson, Benjamin Lincoln, 1864 -1935 (New England Botanical Club [etc.], 1976)

Rhodora - Robinson, Benjamin Lincoln, 1864 -1935 (New England Botanical Club [etc.], 1979)

Ribsam's garden manual - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Martin C. Ribsam, 1917)

Ribsam's garden manual : 1868-1924 - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Martin C. Ribsam, 1924)

Ribsam's garden manual : seeds that grow - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Martin C. Ribsam, 1922)

Ribsam's manual : everything for the farm, lawn and garden - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (C. Ribsam & Son, 1898)

Ribsam's manual of everything for the farm, lawn and garden - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (C. Ribsam & Son, 1900)

Richardson & Gould's seed catalogue. : American Agriculturist Building, no. 245 Broadway, Post Office address, P.O. Box 5134, New York - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Perris & Browne, printers, 164 Fulton Street, 1872)

Rivista italiana di scienze naturali : periodico mensile premiato alle esposizioni nazionali di Palermo e di Milano ed a quella internazionale di Chicago (Ufficio, 1890)

Robert J. Halliday's guide & catalogue of all garden supplies vegetable flower & field seeds plants roots vines etc - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Robert J. Halliday, 1888)

Rodriguésia: Revista do Jardim Botânico do Rio de Janeiro (Instituto de Pesquisas Jardim Botânico do Rio de Janeiro, 1979)

The royal natural history - Lydekker, Richard, 1849 -1915 (Frederick Warne & Co, 1894)

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

The royal natural history - Lydekker, Richard, 1849 -1915 (F. Warne, 1894)

Rukovet palaeozoologie - Počta, Felip (Philipp), 1859 - (Nákladem eské akademie císae Frantika Josefa pro vdy, slovesnost a umní, 1905)

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