Nouveaux mémoires de la Société impériale des naturalistes de Moscou - Moskovskoe obshchestvo liubitelei prirody. (La Société, 1907)

Nova acta Academiae scientiarum imperialis petropolitanae - Imperatorskai︠a︡ akademīi︠a︡ nauk (Russia) (Typis Academiae Scientiarum, 1799)

Nova acta Regiae Societatis Scientiarum Upsaliensis - Kungl. Vetenskaps-societeten i Uppsala. (Almqvist & Wiksells, 1899)

Nova genera et species plantarum :quas in peregrinatione ad plagam aequinoctialem orbis novi collegerunt /descripserunt, partim adumbraverunt Amat. Bonpland et Alex. de Humboldt ; ex schedis autographis Amati Bonplandi in ordinem digessit Carol. Sigismund. Kunth ... - Kunth, Karl Sigismund, 1788 -1850 (Ex officina Christophori Plantini, 1818)

Novelty and specialty and general trade list of "California's choicest flower seeds ... since 1890" : crop 1942 - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Bodger Seeds, Ltd, 1942)

Novelty and specialty and general trade list of "California's choicest flower seeds ... since 1890" : crop 1941 - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Bodger Seeds, Ltd, 1941)

Novelty and specialty and general trade list of "California's choicest flower seeds ... since 1890" : crop 1940 - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Bodger Seeds, Ltd, 1940)

Novelty and specialty and general trade list of "California's choicest flower seeds ... since 1890" : crop 1939 - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Bodger Seeds, Ltd, 1939)

Novelty and specialty and general trade list of "California's choicest flower seeds ... since 1890" : crop 1938 - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Bodger Seeds, Ltd, 1938)

Novelty and specialty and general trade list of California's choicest flower seeds : crop 1937 - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Bodger Seeds, Ltd, 1937)

Nuovi annali delle scienze naturali (1845)

Nuovi annali delle scienze naturali (1847)

Nuovi Saggi della (Cesarea) Regia Accademia di Scienze, Lettere ed Arti di Padova (1840)

Nyt magazin for naturvidenskaberne - Physiographiske forening i Christiania. (Johan Dahl, 1911)

Obras completas y correspondencia científica - Ameghino, Florentino, 1853 -1911 (Taller de Impresiones Oficiales, 1916)

Obras completas y correspondencia científica - Ameghino, Florentino, 1853 -1911 (Taller de Impresiones Oficiales, 1917)

Obras completas y correspondencia científica - Ameghino, Florentino, 1853 -1911 (Taller de Impresiones Oficiales, 1918)

Obras completas y correspondencia científica - Ameghino, Florentino, 1853 -1911 (Taller de Impresiones Oficiales, 1921)

Observationes botanicae - Gloxin, Benjamin Peter. (E Prelo Dannbachiano, Stanno Rolandi et Iacobi, 1785)

Occasional papers of the California Academy of Sciences - California Academy of Sciences (California Academy of Sciences, 1979)

Occasional papers of the California Academy of Sciences - California Academy of Sciences (California Academy of Sciences, 2009)

Occasional papers of the Museum of Natural History, the University of Kansas - University of Kansas. Museum of Natural History. (The University, 1978)

Occasional papers of the Museum of Natural History, the University of Kansas - University of Kansas. Museum of Natural History. (The University, 1979)

Oesterreichische botanische Zeitschrift (A. Skofitz, 1895)

Official lists and indexes of names and works in zoology. Supplement 1986-2000 - International Commission on Zoological Nomenclature (International Trust for Zoological Nomenclature, c/o Natural History Museum, 2001)

Öfversigt af Kongl. Vetenskaps-akademiens forhandlingar - Kungl. Svenska vetenskapsakademien. (P. A. Norstedt & Söner, 1846)

Öfversigt af Kongl. Vetenskaps-akademiens forhandlingar - Kungl. Svenska vetenskapsakademien. (P. A. Norstedt & Söner, 1848)

Ohrknorpel und äusseres ohr der Säugetiere; eine vergleichend-anatomische Untersuchung - Boas, J. E. V. (Johan Erik Vesti), 1855 -1935 ([Nielsen & Lydiche (A. Simmelkiær)], 1912)

Okens Lehrbuch der Naturgeschichte - Oken, Lorenz, 1779 -1851 (Bei Carl Heinrich Reclam, 1815)

Old bones : or, Notes for young naturalists - Brooks, Vincent, 1815? -1885 (Robert Hardwicke, 1861)

Old bones : or, Notes for young naturalists, on vertbebrate animals, their fossil predecessors and allies - Symonds, W. S. 1818 -1887 (Robert Hardwicke, 1864)

On a specimen of Elephas antiquus from Upnor - British Museum (Natural History). Department of Geology. (BM(NH), 1928)

On mammalian descent. Being nine lectures delivered in the theatre of the Royal College of Surgeons during February, 1884 - Parker, William Kitchen William Kitchen Parker 1823 -1890 (Griffin, 1885)

On mammalian descent; the Hunterian Lectures for 1884; being nine lectures delivered in the theatre of the Royal College of Surgeons during February, 1884 - Parker, William Kitchen William Kitchen Parker 1823 -1890 (Charles Griffin, 1885)

On mammalian descent the Hunterian Lectures for 1884 : being nine lectures delivered in the theatre of the Royal College of Surgeons during February, 1884 - Parker, William Kitchen William Kitchen Parker 1823 -1890 (C. Griffin, 1885)

On the evolution of the Proboscidea - Andrews, Charles William, 1866 -1924 (1903)

On the form and structure of the Manatee (Manatus americanus) - Murie, James, 1832 -1925 (Zoological Society of London, 1872)

On the genesis of species - Mivart, St. George Jackson, 1827 -1900 (Macmillan & Co, 1871)

On the genesis of species - Mivart, St. George Jackson, 1827 -1900 (Macmillan, 1871)

On the genesis of species - Mivart, St. George Jackson, 1827 -1900 (D. Appleton, 1871)

On the genesis of species - Mivart, St. George Jackson, 1827 -1900 (D. Appleton and company, 1871)

On the short footed ungulata of the eocene of Wyoming - Cope, E. D. (Edward Drinker), 1840 -1897 (American Philosophical Society, 1873)

On the supposed presence of Miocene Tayassuidae and Dromomerycinae (Mammalia, Cetartiodactyla) in South America - Croft, Darin A. (American Museum of Natural History, 2021)

On the trail of ancient man : a narrative of the field work of the Central Asiatic Expeditions - Osborn, Henry Fairfield, 1857 -1935 (G.P. Putnam's Sons, 1926)

One-hundred and fifth annual catalogue of high class seeds - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (J.M. Thorburn & Co, 1906)

One-hundred and ninth annual catalogue of high class seeds - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (J.M. Thorburn & Co, 1910)

One hundred and second annual catalogue of high-class seeds, 1903 - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (J.M. Thorburn & Co, 1903)

One-hundred-and-sixth annual catalogue of high-class seeds - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (J.M. Thorburn & Co, 1907)

Die Ontogenie der Primatenzähne : versuch einer Lösung der Gebissprobleme - Bolk, L. (Louis), 1866 -1930 (Verlag von Gustav Fischer, 1913)

Die Ontogenie der Primatenzähne - Bolk, L. (Louis), 1866 -1930 (G. Fischer, 1913)

Orchidophile; journal des amateurs d'orchideés - Godefroy-Lebeuf, A. (Alexandre), 1844 -1903 (1884)

The orders of mammals - Gregory, William K. (William King), 1876 -1970 (The Trustees, 1910)

Organic evolution as the result of the inheritance of acquired characters according to the laws of organic growth - Eimer, Theodor, 1843 -1898 (Macmillan, 1890)

Organisation, systematik und geographisches verhältniss der infusionsthierchen. Zwei vorträge, in der Akademie der wissenschaften zu Berlin gehalten in den jahren 1828 und 1830 - Ehrenberg, Christian Gottfried, 1795 -1876 (Druckerei der Königlichen akademie der wissenschaften, 1830)

The origin and affinities of the South American Condylarthra and early Tertiary Litopterna (Mammalia) - Cifelli, Richard (American Museum of Natural History, 1983)

The origin and evolution of life : on the theory of action, reaction and interaction of energy - Osborn, Henry Fairfield, 1857 -1935 (Scribner's, 1918)

The origin and evolution of life, on the theory of action, reaction and interaction of energy - Osborn, Henry Fairfield, 1857 -1935 (C. Scribner's Sons, 1917)

The origin of the fittest : essays on evolution - Cope, E. D. (Edward Drinker), 1840 -1897 (D. Appleton, 1887)

The origin of the fittest : essays on evolution - Cope, E. D. (Edward Drinker), 1840 -1897 (Macmillan and Company, 1887)

The origin of the fittest; essays on evolution - Cope, E. D. (Edward Drinker), 1840 -1897 (D. Appleton, 1887)

The original Beckert's confidential price list for market-gardeners and florists : spring, 1929 - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Beckert's Seed Store, 1929)

The original Beckert's confidential wholesale price-list : market-gardeners and florists spring 1925 - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Beckert's Seed Store, 1925)

The original Beckert's confidential wholesale price-list : market-gardeners and florists spring 1927 - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Beckert's Seed Store, 1927)

The out-door world, or, Young collector's handbook - Furneaux, William S. (Longmans, Green, 1893)

Outlines of comparative anatomy of vertebrates - Kingsley, J. S. (John Sterling), 1854 -1929 (P. Blakiston, 1917)

Outlines of economic zoölogy - Reese, A. M. (Albert Moore), 1872 -1965 (P. Blakiston's Son & Co, 1919)

Outlines of evolutionary biology - Dendy, Arthur, 1865 -1925 (Constable, 1912)

Outlines of evolutionary biology - Dendy, Arthur, 1865 -1925 (D. Appleton and company, 1912)

Outlines of evolutionary biology - Dendy, Arthur, 1865 -1925 (D. Appleton and company, 1914)