Nova acta Regiae Societatis Scientiarum Upsaliensis - Kungl. Vetenskaps-societeten i Uppsala. (Almqvist & Wiksells, 1901)

Nuova notarisia, rassegna consacrata allo studio delle alghe - Toni, Giovanni Battista de, 1864 -1924 (1893)

Nuova notarisia, rassegna consacrata allo studio delle alghe - Toni, Giovanni Battista de, 1864 -1924 (1894)

Nuova notarisia, rassegna consacrata allo studio delle alghe - Toni, Giovanni Battista de, 1864 -1924 (1920)

Nutrient cycling in the Great Lakes : a summarization of factors regulating the cycling of phosphorus - University of Michigan. Great Lakes Research Division. (University of Michigan, Great Lakes Environmental Research Laboratory, Cooperative Program in Great Lakes Longterm Effects Research, 1980)

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

Occasional papers of the Boston Society of Natural History - Boston Society of Natural History. (Boston Society of Natural History, 1905)

Öfversigt af Kongl. Vetenskaps-akademiens forhandlingar - Kungl. Svenska vetenskapsakademien. (P. A. Norstedt & Söner, 1876)

Öfversigt af Kongl. Vetenskaps-akademiens forhandlingar - Kungl. Svenska vetenskapsakademien. (P. A. Norstedt & Söner, 1891)

On a new genus of the Crustacea, and the species on which it is established. Read July 8, 1817 - Say, Thomas, 1787 -1834 (Academy of Natural Sciences of Philadelphia, 1817)

On molecular and microscopic science - Somerville, Mary Fairfax, 1780 -1872 (J. Murray, 1869)

On molecular and microscopic science - Somerville, Mary, 1780 -1872 (J. Murray, 1869)

On the senses, instincts, and intelligence of animals, with special reference to insects - Lubbock, John, Sir, 1834 -1913 (K. Paul, Trench, 1889)

On the senses, instincts, and intelligence of animals : with special reference to insects - Lubbock, John, Sir, 1834 -1913 (Kegan Paul, Trench & Co, 1889)

On the senses, instincts, and intelligence of animals, with special reference to insects - Lubbock, John, Sir, 1834 -1913 (D. Appleton and Company, 1888)

On the senses, instincts, and intelligence of animals : with special reference to insects - Lubbock, John, Sir, 1834 -1913 (Kegan Paul, Trench, 1888)

One thousand objects for the microscope - Cooke, M. C. (Mordecai Cubitt), 1825 -1914 (F. Warne, 1869)

One thousand objects for the microscope - Cooke, M. C. (Mordecai Cubitt), 1825 -1914 (Frederick Warne, 1869)

The open book of nature : an introduction to nature study - Hall, Charles A. (Charles Albert), 1872 -1965 (Adam and Charles Black, 1911)

Ornis - International Ornithological Committee. (Carl Gerold's Sohn, 1896)

Ornithological notes - Herrick, C. L. (Clarence Luther), 1858 -1904 (Geological and Natural History Survey of Minnesota, 1877)

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

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

Palaeontographica (Theodor Fischer, 1861)

Pamietnik Fizyjograficzny (Druk K. Kowalewskiego, 1918)

Papers and proceedings of the Royal Society of Tasmania - Royal Society of Tasmania. (The Society, 1868)

Papers from the Tortugas Laboratory of the Carnegie Institution of Washington - Carnegie Institution of Washington. Department of Marine Biology. (Carnegie Institution of Washington, 1911)

Partial syllabic lists of the clinical morphologies of the blood, sputum, feces, skin, urine, vomitus, foods : including potable waters, ice and the air, and the clothing (after Salisbury) - Cutter, Ephraim, 1832 -1917 (The Ariston, 1888)

Pesticides documentation bulletin - National Agricultural Library (U.S.) (National Agricultural Library, U.S. Dept. of Agriculture, #c 1965-1969, 1965)

Pflanzenphysiologie; Versuche und Beobachtungen an böheren und niederen Pflanzen einschliesslich Bakteriologie und Hydrobiologie mit Planktonkunde - Kolkwitz, R. (Richard), 1873 -1956 (G. Fischer, 1922)

Pflanzenphysiologie. Versuche und beobachtungen an höheren und niederen pflanzen einschliesslich bakteriologie und hydrobiologie mit planktonkunde - Kolkwitz, R. (Richard), 1873 -1956 (G. Fischer, 1914)

Pflügers Archiv für die gesamte Physiologie des Menschen und der Tiere (M. Hager, 1915)

Pflügers Archiv für die gesamte Physiologie des Menschen und der Tiere (M. Hager, 1922)

Pflügers Archiv für die gesamte Physiologie des Menschen und der Tiere (M. Hager, 1911)

Pharmaceutical journal and transactions - Pharmaceutical Society of Great Britain. (J. & A. Churchill, 1876)

Philosophical transactions of the Royal Society of London - Royal Society (Great Britain) (Royal Society of London, 1852)

Philosophical transactions of the Royal Society of London - Royal Society (Great Britain) (Royal Society of London, 1857)

Die Phyllopoden, Cladoceren und freilebenden Copepoden der nord- schwedischen Hochgebirge : ein Beitrag zur Tiergeographie, Biologie und Systematik der arktischen, nord- und mittel-europäischen Arten - Ekman, Sven, 1876 -1964 (G. Fischer, 1904)

Physiologie des Menschen und der Säugethiere - Du Bois-Reymond, R. (René), 1863 -1938 (August Hirschwald, 1908)

Die pilze in morphologischer, physiologischer, biologischer und systematischer beziehung - Zopf, W. (Wilhelm), 1846 -1909 (E. Trewendt, 1890)

Planktonkunde - Steuer, Adolf, 1871 - (B.G. Teubner, 1910)

The playtime naturalist - Taylor, J. E. (John Ellor), 1837 -1895 (Chatto & Windus, 1889)

Polycyclic aromatic hydrocarbons : sources, fate and levels in air, water, soil, sediments, sludge and food in Ontario - Ontario. Hazardous Contaminants Branch. (Environment Ontario, 1992)

Ponds and ditches - Cooke, M. C. (Mordecai Cubitt), 1825 -1914 (Society for Promoting Christian Knowledge, 1880)

Ponds and rock pools : with hints on collecting for and the management of the micro-aquarium - Scherren, Henry, 1842 -1911 (Religious Tract Society, 1894)

Ponds and rock pools, with hints on collecting for and the management of the micro-aquarium - Scherren, Henry, 1842 -1911 (Religious Tract Society, 1900)

A popular history of British Crustacea; comprising a familiar account of their classification and habits - White, Adam, 1817 -1879 (L. Reeve, 1857)

A popular history of British Crustacea : comprising a familiar account of their classification and habits - White, Adam, 1817 -1879 (L. Reeve, 1857)

The Popular science monthly - Harry Houdini Collection (Library of Congress) (Popular Science Pub. Co., etc, 1873)

Popular Science Review (1867)

Population dynamics and productivity of zooplankton in two sandhills lakes - Maslin, Paul E., 1943 - (1969)

Practical microscopy - Davis, George E. (George Edward), 1907 (D. Bogue, 1882)

A practical treatise on the use of the microscope, including the different methods of preparing and examining animal, vegetable, and mineral structures - Quekett, John, 1815 -1861 (H. Bailliere, 1848)

A practical treatise on the use of the microscope, including the different methods of preparing and examining animal, vegetable, and mineral structures - Quekett, John, 1815 -1861 (H. Bailliere; [etc., etc.], 1852)

A preliminary report on the aquatic invertebrate fauna of the Yellowstone National Park, Wyoming, and of the Flathead Region of Montana - Forbes, Stephen Alfred, 1844 -1930 (Govt. Prtg. Off, 1893)

Principles of physiology, general and comparative - Carpenter, William Benjamin, 1813 -1885 (John Churchill, 1851)

Prirodoslovna istraživanja - Jugoslavenska akademija znanosti i umjetnosti. (1913)

Les problèmes de la sexualité - Caullery, Maurice, 1868 -1958 (E. Flammarion, 1919)

Proceedings and transactions of the Liverpool Biological Society - Liverpool Biological Society. (The Society, 1897)

Proceedings - Cambridge Philosophical Society. Mathematical and physical sciences - Cambridge Philosophical Society. (Cambridge Philosophical Society [etc.], 1922)

Proceedings of the Biological Society of Washington - Smithsonian Institution (Biological Society of Washington, 1990)

Proceedings of the Canadian Institute - Glenny, George, 1793 -1874 (Canadian Institute, 1879)

Proceedings of the Canadian Institute - Glenny, George, 1793 -1874 (Canadian Institute, 1883)

Proceedings of the Entomological Society of Washington - Entomological Society of Washington (Entomological Society of Washington, 1981)

Proceedings of the Entomological Society of Washington - Entomological Society of Washington (Entomological Society of Washington, 1983)

Proceedings of the Indiana Academy of Science - Indiana Academy of Science. ([s.n.], 1900)

Proceedings of the Indiana Academy of Science - Indiana Academy of Science. ([s.n.], 1910)

Proceedings of the Indiana Academy of Science - Indiana Academy of Science. ([s.n.], 1908)

Proceedings of the Indiana Academy of Science - Indiana Academy of Science. ([s.n.], 1918)

Proceedings of the Indiana Academy of Science - Indiana Academy of Science. ([s.n.], 1919)

The Proceedings of the Iowa Academy of Science - Iowa Academy of Science (The Academy, 1895)

The Proceedings of the Iowa Academy of Science - Iowa Academy of Science (The Academy, 1906)

Proceedings of the Linnean Society of New South Wales - Linnean Society of New South Wales. (Linnean Society of New South Wales, 1992)

Proceedings of the National Academy of Sciences of the United States of America - National Academy of Sciences (U.S.) (National Academy of Sciences [etc.], 1918)

Proceedings of the Natural History Association of Miramichi - Natural History Association of Miramichi. (The Association, 1899)