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

On a true parthenogenesis in moths and bees, a contribution to the history of reproduction in animals - Siebold, C. Th. E. von (Carl Theodor Ernst), 1804 -1885 (J. Van Voorst, 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 land and fresh-water molluska of Lower Canada - Whiteaves, Joseph Frederick, 1835 -1909 (s.n, 1863)

On the marine mollusca of Maderia : with descriptions of thirty-five new species and an index-list of all known sea-dweling species of that island - Watson, Robert Boog. 1823 -1910 (Linnean Society of London, 1897)

On the origin of freshwater faunas: a study in evolution - Sollas, W. J. (William Johnson), 1849 -1936 (Royal Dublin Society, 1884)

On the species composition of Viviparids : (Gastropoda, Viviparidae) in Europe and western Asia - Boss, Kenneth J. (Kenneth Jay), 1935 -2014 (Dept. of Mollusks, Museum of Comparative Zoology, Harvard University, 1992)

On a true parthenogenesis in moths and bees, a contribution to the history of reproduction in animals - Siebold, C. Th. E. von (Carl Theodor Ernst), 1804 -1885 (John Van Voorst, Paternoster Row, 1857)

On a true parthenogenesis in moths and bees; a contribution to the history of reproduction in animals - Siebold, C. Th. E. von (Carl Theodor Ernst), 1804 -1885 (J. Van Voorst, 1857)

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)

Opisthobranch newsletter - Long, Steven J. (S.J. Long, 1969)

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, 1895)

The Ottawa naturalist - Ottawa Field-Naturalists' Club (Ottawa Field-Naturalists' Club, 1900)

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

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

Our British snails - Society for Promoting Christian Knowledge (Great Britain) (Society for Promoting Christian Knowledge, 1915)

Our common insects. A popular account of the insects of our fields, forests, gardens and houses - Packard, A. S. (Alpheus Spring), 1839 -1905 (Naturalists' Agency, 1873)

Our common insects A popular account of the insects of our fields, forests, gardens, and houses - Packard, A. S. (Alpheus Spring), 1839 -1905 (Estes and Lauriat, 1873)

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

Outlines of general zoology - Baird, Spencer Fullerton, 1823 -1887 (Rudolph Garrigue, 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, 1901)

Palaeontographia Italica : Memorie di paleontologia - Canavari, Mario 1855 -1928 (Tip. T. Nistri, 1916)

Palaeontographica (Theodor Fischer, 1871)

Palaeontographica (Theodor Fischer, 1889)

Palaeontographica (Theodor Fischer, 1895)

Palaeontographica (Theodor Fischer, 1897)

Palaeontographica (Theodor Fischer, 1901)

Palaeontographica (Theodor Fischer, 1909)

Palaeontology - Palaeontological Association (Palaeontological Association, 1963)

Palaeontology - Palaeontological Association (Palaeontological Association, 1979)

Palaeontology - Palaeontological Association (Palaeontological Association, 1991)

Palaeontology - Palaeontological Association (Palaeontological Association, 1995)

Palæontology of the upper Missouri: a report upon collections made principally by the expeditions under command of Lieut. G. K. Warren, U.S. Top. Engrs., in 1855 and 1856. Invertebrates - Hayden, F. V. (Ferdinand Vandeveer), 1829 -1887 (Smithsonian Institution, 1865)

Palaozoologie : Entwurf einer systematischen Darstellung der Fauna der Vorwelt - Giebel, C. (Christoph), 1820 -1881 (Nulandt'sche buchandlung (L. Garcke), 1846)

Paleontological research - Nihon Koseibutsu Gakkai (Palaeontological Society of Japan, 1999)

Paléontologie de la France - Archiac, vicomte d' (Etienne Jules Adolphe Desmier), 1802 -1868 (Imprimerie impériale, 1868)

Paleontology of the Coalinga district, Fesno and Kings counties, California - Arnold, Ralph, 1875 -1961 (Govt. Print. Off, 1909)

Pamietnik Fizyjograficzny (Druk K. Kowalewskiego, 1881)

Pamietnik Fizyjograficzny (Druk K. Kowalewskiego, 1882)

The Pan-Pacific entomologist - Van Duzee, Edward P. (Edward Payson), 1861 -1940 (Pacific Coast Entomological Society, 1929)

Papers and proceedings of the Royal Society of Tasmania - Royal Society of Tasmania. (The Society, 1875)

Papers and proceedings of the Royal Society of Tasmania - Royal Society of Tasmania. (The Society, 1878)

Papers and proceedings of the Royal Society of Tasmania - Royal Society of Tasmania. (The Society, 1879)

Papers and proceedings of the Royal Society of Tasmania - Royal Society of Tasmania. (The Society, 1889)

Papers and proceedings of the Royal Society of Tasmania - Royal Society of Tasmania. (The Society, 1888)

Papers and proceedings of the Royal Society of Tasmania - Royal Society of Tasmania. (The Society, 1890)

Papers and proceedings of the Royal Society of Tasmania - Royal Society of Tasmania. (The Society, 1898)

Papers and proceedings of the Royal Society of Tasmania - Royal Society of Tasmania. (The Society, 1915)

Papers read before the Purbeck Society - Purbeck Society. (1856)

Part I. Palæontology - Hall, James, 1811 -1898 (Govt. print. off, 1877)

Periódico zoológico - Sociedad Entomológica Argentina. (Sociedad Entomica Argentina, 1874)

Petrefactenkunde Deutschlands / von Fr. Aug. Quenstedt - Quenstedt, Fr. Aug. von (Friedrich August), 1809 -1889 (L.F. Fues, 1884)

Petrefactenkunde Deutschlands / von Fr. Aug. Quenstedt - Quenstedt, Fr. Aug. von (Friedrich August), 1809 -1889 (L.F. Fues, 1881)

Philosophical transactions of the Royal Society of London - Royal Society (Great Britain) (Royal Society of London, 1835)

Philosophical transactions of the Royal Society of London - Royal Society (Great Britain) (Royal Society of London, 1860)

The philosophy of zoology, or, A general view of the structure, functions, and classification of animals - Fleming, John, 1785 -1857 (Hurst, Robinson & Co, 1822)

The philosophy of zoology; or, A general view of the structure, functions, and classification of animals - Fleming, John, 1785 -1857 (A. Constable, 1822)

The physical geology and geography of Great Britain : a manual of British geology - Woodward, Horace B. (Horace Bolingbroke), 1848 -1914 (E. Stanford, 1878)

Phytologia - Moldenke, Harold N. (Harold Norman), 1909 -1996 (H.A. Gleason and H.N. Moldenke, 1979)

The pictorial museum of animated nature ... - Knight, Charles, 1791 -1873 (C. Knight, 1844)

The pictorial museum of animated nature - Knight, Charles, 1791 -1873 (C. Cox, 1844)

A plain and easy account of the land and fresh-water mollusks of Great Britain : containing descriptions, figures, and a familiar account of the habits of each species - Tate, Ralph, 1840 -1901 (R. Hardwicke, 1866)

A plain and easy account of the land and freshwater mollusks of Great Britain - Vincent Brooks, Day & Son, (R. Hardwicke, 1866)

The Pliocene deposits of Britain - Reid, Clement, 1853 -1916 (Printed for HMSO by Eyre and Spottiswoode, 1890)

A pocket guide to the British non-marine Mollusca, including fossil forms which occur in the post-pliocene deposits, excepting the forest bed series - Swanton, Ernest W. (C. Mosley, 1906)

Popular British conchology. A familiar history of the molluscs inhabiting the British Isles - Sowerby, George Brettingham, 1788 -1854 (Lovell Reeve, 1854)

Popular conchology, or, The shell cabinet arranged according to the modern system : with a detailed account of the animals, and a complete descriptive list of the families and genera of recent and fossil shells - Catlow, Agnes, 1807? -1889 (Longman, Brown, Green, and Longmans, 1854)

Popular conchology : or, The shell cabinet arranged: being an introduction to the modern system of conchology, with a sketch of the natural history of the animals, an account of the formation of the shells, and a complete descriptive list of the families and genera - Catlow, Agnes, 1807? -1889 (Longman, Brown, Green, and Longmans, 1843)

A popular history of the Mollusca; comprising a familiar account of their classification, instincts and habits, and of the growth and distinguishing characters of their shells - Roberts, Mary, 1788 -1864 (Reeve and Benham, 1851)

The Popular science monthly - Harry Houdini Collection (Library of Congress) (Popular Science Pub. Co., etc, 1896)

Popular Science Review (1868)

The powers of the Creator displayed in the creation; or, Observations on life amidst the various forms of the humbler tribes of animated nature - Dalyell, John Graham, 1775 -1851 (J. Van Voorst, 1858)

The powers of the Creator displayed in the creation; or, Observations on life amidst the various forms of the humbler tribes of animated nature - Dalyell, John Graham, 1775 -1851 (J. Van Voorst, 1851)

A practical handbook of British birds - Witherby, H. F. (Harry Forbes), 1873 -1944 (Witherby, 1922)

A practical handbook of British birds - Witherby, H. F. (Harry Forbes), 1873 -1944 (Witherby, 1924)

Précis analytique de l'histoire naturelle des mollusques terrestres et fluviatiles qui vivent dan le Bassin Sous-Pyrénéen - Noulet, J.-B. (Jean-Baptiste), 1802 -1890 (J.-B. Paya, 1834)