Nouvelles suites à Buffon (Roret, 1854)

Nova acta physico-medica Academiae Caesareae Leopoldino-Carolinae Naturae Curiosum - Academia Caesarea Leopoldino-Carolina Naturae Curiosorum. (1783)

Nova acta physico-medica Academiae Caesareae Leopoldino-Carolinae Naturae Curiosum - Academia Caesarea Leopoldino-Carolina Naturae Curiosorum. (1828)

Nova acta physico-medica Academiae Caesareae Leopoldino-Carolinae Naturae Curiosum - Academia Caesarea Leopoldino-Carolina Naturae Curiosorum. (1826)

Novitates zoologicae : a journal of zoology in connection with the Tring Museum - British Museum (Natural History) (Zoological Museum, 1902)

Novorum actorum Academiae Caesareae Leopoldino-Carolinae Germanicae Naturae Curiosorum - Kaiserlich Leopoldinisch-Carolinische Deutsche Akademie der Naturforscher (Friedrich Frommann, 1865)

The nucleic acids: chemistry and biology - Chargaff, Erwin. (Academic Press, 1955)

Nuovi annali delle scienze naturali (1851)

Nuovi annali delle scienze naturali (1854)

Observationes Zoologicae : quibus novae complures, aliaeque animalium species describuntur et illustrantur - Hermann, Johannis. (Amandum Koenig, 1804)

Occasional papers - San Diego Society of Natural History. (San Diego Society of Natural History, 1936)

Occasional papers - Boston Society of Natural History. (1904)

Occasional papers - San Diego Society of Natural History. (San Diego Society of Natural History, 1938)

Occasional papers - San Diego Society of Natural History. (San Diego Society of Natural History, 1939)

Occasional papers - San Diego Society of Natural History. (San Diego Society of Natural History, 1940)

Occasional papers - Texas Tech University. Museum, (The Museum, 1975)

Occasional papers - Texas Tech University. Museum, (The Museum, 1992)

Occasional papers of the California Academy of Sciences - California Academy of Sciences (California Academy of Sciences, 1897)

Occasional papers of the California Academy of Sciences - California Academy of Sciences (California Academy of Sciences, 1922)

Occasional papers of the California Academy of Sciences - California Academy of Sciences (California Academy of Sciences, 1983)

Occasional papers of the California Academy of Sciences - California Academy of Sciences (California Academy of Sciences, 2010)

Occasional papers of the California Academy of Sciences - California Academy of Sciences (California Academy of Sciences, 2013)

Occasional papers of the Museum of Natural History, the University of Kansas - University of Kansas. Museum of Natural History. (The University, 1985)

Occasional papers of the Museum of Natural History, the University of Kansas - University of Kansas. Museum of Natural History. (The University, 1990)

Occasional papers of the Museum of Natural History, the University of Kansas - University of Kansas. Museum of Natural History. (The University, 1993)

Occasional papers of the Museum of Zoology, University of Michigan - University of Michigan. Museum of Zoology. (University of Michigan, 1913)

Odontographie. Vergleichende Darstellung des Zahnsystemes der lebenden und fossilen Wirbelthiere - Giebel, C. (Christoph), 1820 -1881 (A. Abel, 1855)

Odontography : or a treatise on the comparative anatomy of the teeth, their physiological relations, mode of development and microscopic structure, in the vertebrate animals - Owen, Richard, 1804 -1892 (Hippolyte Bailliere, 1840)

Odontography; or, A treatise on the comparative anatomy of the teeth; their physiological relations, mode of development, and microscopic structure, in the vertebrate animals - Owen, Richard, 1804 -1892 (H. Baillière, 1840)

Oeuvres du comte de Lacépède : comprenant l'histoire naturelle des quadrupèdes ovipares, des serpens, des poissons et des cétacés : accompagnées de 150 planches gravées sur acier, représentant au moins 500 animaux - La Cépède, M. le comte de (Bernard Germain Etienne de La Ville sur Illon), 1756 -1825 (P. Duménil, 1836)

Oeuvres du comte de Lacépède : comprenant l'histoire naturelle des quadrupèdes ovipares, des serpents, des poissons et des cétacés; accompanées du portrait de l'auteur et d'environ 400 figures, exécutés pour cette édition par les meilleurs artistes - Cuvier, Georges, baron, 1769 -1832 (Chez F.D. Pillot, 1832)

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)

Official lists and indexes of names and works in zoology - International Commission on Zoological Nomenclature (ICZN, 1987)

Öfversigt af Kongl. Vetenskaps-akademiens forhandlingar - Kungl. Svenska vetenskapsakademien. (P. A. Norstedt & Söner, 1871)

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

Okens Lehrbuch der Naturgeschichte - Oken, Lorenz, 1779 -1851 (Bei Carl Heinrich Reclam, 1816)

On the anatomy of vertebrates - Owen, Richard, 1804 -1892 (Longmans, Green, 1866)

On the anatomy of vertebrates ... - Owen, Richard, 1804 -1892 (Longmans, Green and Co, 1866)

On the egg-tooth of snakes and lizards, with a plate on the armature of the lower bill of the hatching Tring Pusilla...Wilson - Weinland, D. F. (David Friedrich), 1829 -1915 (William Ives and George W. Pease, Printers, 1857)

On the geology and natural history of the upper Missouri :Being the substance of a report made to Lieut. G.K. Warren, T.E. U.S.A - Hayden, F. V. (Ferdinand Vandeveer), 1829 -1887 (Printed by C. Sherman & son, 1862)

On the poison of venomous snakes and the methods of preventing death from their bite - Fayrer, Joseph, Sir, 1824 -1907 (Macmillan and Co., limited, 1909)

On the poison of venomous snakes and the methods of preventing death from their bite. Reprinted papers by Sir Joseph Fayrer, Sir Lauder Brunton and Major Leonard Rogers - Fayrer, Joseph, Sir, 1824 -1907 (Macmillan, 1909)