Opinions and declarations rendered by the International Commission on Zoological Nomenclature - International Commission on Zoological Nomenclature (Printed by order of the International Trust for Zoological Nomenclature, 1955)

Opinions and declarations rendered by the International Commission on Zoological Nomenclature - International Commission on Zoological Nomenclature (Printed by order of the International Trust for Zoological Nomenclature, 1957)

Opinions and declarations rendered by the International Commission on Zoological Nomenclature - International Commission on Zoological Nomenclature (Printed by order of the International Trust for Zoological Nomenclature, 1954)

Oppian, Colluthus, Tryphiodorus, with an English translation by A.W. Mair - Colluthus, of Lycopolis. (W. Heinemann, 1928)

Opuscula subseciva, observationes miscellaneas de animalculis et plantis quibusdam marinis, eorumque ovariis et seminibus continentia - Baster, Job, 1711 -1775 (apud J. Bosch, 1762)

Ordnance survey of the county of Londonderry - Great Britain. Ordnance Survey. (1835)

The Oregon naturalist (Naturalist Pub. Co, 1896)

Ornis - International Ornithological Committee. (Carl Gerold's Sohn, 1885)

Ornithologische Monatsschrift - Deutscher Verein zum Schutze der Vogelwelt. (Kommissions-Verlag der Creutschen Verlagsbuchhandlung, 1892)

Ornithologische Monatsschrift - Deutscher Verein zum Schutze der Vogelwelt. (Kommissions-Verlag der Creutschen Verlagsbuchhandlung, 1902)

Ornithologische Monatsschrift - Deutscher Verein zum Schutze der Vogelwelt. (Kommissions-Verlag der Creutschen Verlagsbuchhandlung, 1903)

Ornithologische Monatsschrift - Deutscher Verein zum Schutze der Vogelwelt. (Kommissions-Verlag der Creutschen Verlagsbuchhandlung, 1905)

Ornithologische Monatsschrift - Deutscher Verein zum Schutze der Vogelwelt. (Kommissions-Verlag der Creutschen Verlagsbuchhandlung, 1908)

Ornithologische Monatsschrift - Deutscher Verein zum Schutze der Vogelwelt. (Kommissions-Verlag der Creutschen Verlagsbuchhandlung, 1913)

Ornithologische Monatsschrift - Deutscher Verein zum Schutze der Vogelwelt. (Kommissions-Verlag der Creutschen Verlagsbuchhandlung, 1914)

Ornithologische Monatsschrift - Deutscher Verein zum Schutze der Vogelwelt. (Kommissions-Verlag der Creutschen Verlagsbuchhandlung, 1915)

Ornithologische Monatsschrift - Deutscher Verein zum Schutze der Vogelwelt. (Kommissions-Verlag der Creutschen Verlagsbuchhandlung, 1916)

Ornithologische Monatsschrift - Deutscher Verein zum Schutze der Vogelwelt. (Kommissions-Verlag der Creutschen Verlagsbuchhandlung, 1921)

Ornithologisches Centralblatt (L.A. Kittler, 1878)

Ornithologisches Centralblatt (L.A. Kittler, 1879)

Osservazioni zoologiche / di Arcangelo Scacchi - Scacchi, Arcangelo, 1810 -1893 (Pe'tipi della Societá tipografica, 1833)

Ostéographie des cétacés vivants et fossiles, comprenant la description et l'iconographie du squelette et du système dentaire de ces animaux, ainsi que des documents relatifs à leur histoire naturelle - Gervais, Paul, 1816 -1879 (A. Bertrand, 1880)

Otia conchologica : descriptions of shells and mollusks, from 1839 to 1862 - Gould, Augustus A. (Augustus Addison), 1805 -1866 (Gould and Lincoln, 1862)

Otia conchologica : descriptions of shells and mollusks from 1839 to 1862 / by Augustus A. Gould, M.D - Gould, Augustus A. (Augustus Addison), 1805 -1866 (1846)

The Ottawa naturalist - Ottawa Field-Naturalists' Club (Ottawa Field-Naturalists' Club, 1892)

The Ottawa naturalist - Ottawa Field-Naturalists' Club (Ottawa Field-Naturalists' Club, 1893)

The Ottawa naturalist - Ottawa Field-Naturalists' Club (Ottawa Field-Naturalists' Club, 1897)

The Ottawa naturalist - Ottawa Field-Naturalists' Club (Ottawa Field-Naturalists' Club, 1902)

The Ottawa naturalist - Ottawa Field-Naturalists' Club (Ottawa Field-Naturalists' Club, 1905)

The Ottawa naturalist - Ottawa Field-Naturalists' Club (Ottawa Field-Naturalists' Club, 1907)

The Ottawa naturalist - Ottawa Field-Naturalists' Club (Ottawa Field-Naturalists' Club, 1914)

The Ottawa naturalist - Ottawa Field-Naturalists' Club (Ottawa Field-Naturalists' Club, 1919)

The Ottawa naturalist - Ottawa Field-Naturalists' Club (Ottawa Field-Naturalists' Club, 1918)

Our common British fossils, and where to find them; a handbook for students - Taylor, J. E. (John Ellor), 1837 -1895 (Chatto, 1885)

Our country's shells and how to know them : a guide to the British mollusca - Gordon, W. J. (Simpkin, Marshall, Hamilton, Kent & Co, 1901)

Our floating population : buoy collecting 1937-1940 - Gray, George M. (1940)

Our living oceans : report on the status of U.S. living marine resources, 1999 - United States. National Marine Fisheries Service. (U.S. Dept. of Commerce, National Oceanic and Atmospheric Administration, National Marine Fisheries Service, 1999)

Our living oceans : report on the status of U.S. living marine resources, 1992 - United States. National Marine Fisheries Service. (U.S. Dept. of Commerce, National Oceanic and Atmospheric Administration, National Marine Fisheries Service, 1992)

Our living oceans the ... annual report on the status of U.S. living marine resources - United States. National Marine Fisheries Service. (U.S. Dept. of Commerce, National Oceanic and Atmospheric Administration, National Marine Fisheries Service, 1991)

Our living oceans : the first annual report on the status of U.S. living marine resources - United States. National Oceanic; Atmospheric Administration. (U.S. Dept. of Commerce, 1991)

Our living resources : a report to the nation on the distribution, abundance, and health of U.S. plants, animals, and ecosystems - United States. National Biological Service. (U.S. Dept. of the Interior, National Biological Service, 1995)

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

An outline of the natural history of our shores - Sinel, Joseph. (Swan Sonnenschein & Co, 1906)

Outlines of comparative physiology : touching the structure and development of the races of animals, living and extinct : for the use of schools and colleges - Agassiz, Louis, 1807 -1873 (H.G. Bohn, 1851)

Outlines of comparative physiology : touching the structure and development of the races of animals, living and extinct, for the use of schools and colleges - Agassiz, Louis, 1807 -1873 (Bell & Daldy, 1867)

Outlines of comparative physiology : touching the structure and development of the races of animals, living and extinct - Agassiz, Louis, 1807 -1873 (H. G. Bohn, 1851)

Outlines of comparative physiology touching the structure and development of the races of animals, living and extinct : for the use of schools and colleges - Agassiz, Louis, 1807 -1873 (Bell & Daldy, 1870)

Outlines of creation - Noyce, Elisha. (Ward & Lock, 1858)

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

Outlines of general zoology - Baird, Spencer Fullerton, 1823 -1887 (Rudolph Garrigue, 1851)

Outlines of zoology - Thomson, J. Arthur (John Arthur), 1861 -1933 (Pentland, 1899)

Outlines of zoology - Thomson, J. Arthur (John Arthur), 1861 -1933 (D. Appleton & Co, 1895)

Outlines of zoology - Thomson, J. Arthur (John Arthur), 1861 -1933 (Young J. Pentland, 1892)

Outlines of zoology - Thomson, J. Arthur (John Arthur), 1861 -1933 (Young J. Pentland, 1895)

Outlines of zoology - Thomson, J. Arthur (John Arthur), 1861 -1933 (H. Frowde and Hodder & Stoughton, 1921)

Outlines of zoology - Thomson, J. Arthur (John Arthur), 1861 -1933 (D. Appleton, 1906)

Outlines of zoology - Thomson, J. Arthur (John Arthur), 1861 -1933 (D. Appleton, 1895)

Outlines of zoology - Thomson, J. Arthur (John Arthur), 1861 -1933 (Humphrey Milford, Oxford University Press, 1929)

Oversigt over det Kongelige Danske videnskabernes selskabs forhandlinger = Bulletin de l'Académie royale des sciences et des lettres de Danemark - Kongelige Danske videnskabernes selskab. (A.F. Høst, 1814)

Oversigt over det Kongelige Danske videnskabernes selskabs forhandlinger = Bulletin de l'Académie royale des sciences et des lettres de Danemark - Kongelige Danske videnskabernes selskab. (A.F. Høst, 1836)

Oversigt over det Kongelige Danske videnskabernes selskabs forhandlinger = Bulletin de l'Académie royale des sciences et des lettres de Danemark - Kongelige Danske videnskabernes selskab. (A.F. Høst, 1846)

Oversigt over det Kongelige Danske videnskabernes selskabs forhandlinger = Bulletin de l'Académie royale des sciences et des lettres de Danemark - Kongelige Danske videnskabernes selskab. (A.F. Høst, 1851)

Oversigt over det Kongelige Danske videnskabernes selskabs forhandlinger = Bulletin de l'Académie royale des sciences et des lettres de Danemark - Kongelige Danske videnskabernes selskab. (A.F. Høst, 1854)

Oversigt over det Kongelige Danske videnskabernes selskabs forhandlinger = Bulletin de l'Académie royale des sciences et des lettres de Danemark - Kongelige Danske videnskabernes selskab. (A.F. Høst, 1881)

Oxygen depletion and associated benthic mortalities in New York Bight, 1976 - Sindermann, Carl J. (National Oceanic and Atmospheric Administration, 1979)

The oyster and the oyster industry of the Atlantic and Gulf coasts - Churchill, E. P. (Edward Perry), 1882 -1976 (Govt. print. off, 1920)

The oyster industry - United States. Bureau of Fisheries. (Govt. Print. Off, 1881)

Oysters, and all about them : being a complete history of the titular subject, exhaustive on all points of necessary and curious information from the earliest writers to those of the present time, with numerous additions, facts, and notes - Philpots, John Richards. (J. Richardson, 1890)

Pacific science - University of Hawaii. (University Press of Hawaii, 1947)

Pacific science - University of Hawaii. (University Press of Hawaii, 1955)

Pacific science - University of Hawaii. (University Press of Hawaii, 1961)

Pacific science - University of Hawaii. (University Press of Hawaii, 1963)

Pacific science - University of Hawaii. (University Press of Hawaii, 1964)

Pacific science - University of Hawaii. (University Press of Hawaii, 1966)

Pacific science - University of Hawaii. (University Press of Hawaii, 1968)

Pacific seabirds : a publication of the Pacific Seabird Group - Pacific Seabird Group. (The Group, 2010)

Palaeontographia Italica : Memorie di paleontologia - Canavari, Mario 1855 -1928 (Tip. T. Nistri, 1907)

Palaeontographica (Theodor Fischer, 1880)

Palaeontographica (Theodor Fischer, 1900)

Palaeontographica (Theodor Fischer, 1905)

Palaeontographica Americana - Paleontological Research Institution (Ithaca, N.Y.) (Paleontological Research Institution, 1965)

Palaeontographica Americana - Paleontological Research Institution (Ithaca, N.Y.) (Paleontological Research Institution, 1976)

Palaeontology - Palaeontological Association (Palaeontological Association, 1963)

Palaeontology - Palaeontological Association (Palaeontological Association, 1965)

Palaeontology - Palaeontological Association (Palaeontological Association, 1966)

Palaeontology - Palaeontological Association (Palaeontological Association, 1967)