The plankton of the Illinois river, 1894-1899, with introductory notes upon the hydrography of the Illinois river and its basin - Kofoid, Charles A. (Charles Atwood), 1865 -1947 (1903)

The plankton of the Illinois river, 1894-1899, with introductory notes upon the hydrography of the Illinois river and its basin - Kofoid, Charles A. (Charles Atwood), 1865 -1947 (1908)

Planktonic studies: a comparative investigation of the importance and constitution of the pelagic fauna and flora - Field, George Wilton, 1863 -1938 (Govt. Print. Off, 1893)

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

Plant physiology; authorized English translation by R. J. HarveyGibson; supplement incorporating the alterations of the 2d ed. of the German original - Harvey-Gibson, R. J. (Robert John), 1860 -1929 (Clarendon Press, 1913)

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

Polychaeta - Benham, W. B. (William Blaxland), 1860 -1950 (Australasian Antarctic Expedition, 1921)

Polychaetes & allies : the southern synthesis - Glasby, Christopher John (Environment Australia, 2000)

Pond life - Ash, Edward C. (Edward Cecil), 1888 - (T.C. & E.C. Jack, 1913)

Pond life - Ash, Edward C. (Edward Cecil), 1888 - (T.C. & E. Jack, 1913)

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

Popular history of the aquarium of marine and fresh-water animals and plants - Sowerby, George Brettingham, 1788 -1854 (Lovell Reeve, 1857)

The popular natural history - Wood, J. G. (John George), 1827 -1889 (Burt Co, 1884)

Popular natural history - Wood, J. G. (John George), 1827 -1889 (Porter & Coates, 1885)

The Popular science monthly - Harry Houdini Collection (Library of Congress) (Popular Science Pub. Co., etc, 1878)

The Popular science monthly - Harry Houdini Collection (Library of Congress) (Popular Science Pub. Co., etc, 1889)

The Popular science monthly - Harry Houdini Collection (Library of Congress) (Popular Science Pub. Co., etc, 1913)

The Popular science monthly - Harry Houdini Collection (Library of Congress) (Popular Science Pub. Co., etc, 1872)

Popular Science Review (1862)

Popular Science Review (1863)

Popular Science Review (1864)

Popular Science Review (1865)

Popular Science Review (1866)

Popular Science Review (1867)

Popular Science Review (1868)

Popular Science Review (1869)

Popular Science Review (1872)

Popular Science Review (1875)

Popular scientific recreations in natural philosophy, astronomy, geology, chemistry - Tissandier, Gaston, 1843 -1899 (Ward, Lock, 1883)

A popular treatise on the physiology of plants for the use of gardeners or for students of horticulture and of agriculture - Sorauer, Paul, 1839 -1916 (Longmans, Green, and Co, 1895)

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

The porifera and coelentera - Bourne, Gilbert C. (Gilbert Charles), 1861 -1933 (Adam & Charles Black, 1900)

Pozsonyi Orvos-Termeszettudomanyi Egyesulet Kozlemenyei - Verein für natur- und heilkunde, Pressburg (1905)

Practical lessons in science - Scovell, J. T. (Josiah Thomas), 1841 - (The Werner Co, 1895)

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 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)

Preliminary Biological Survey of Five Lakes in the Buffalo Head Hills. February 1970 - Smith, Alan R., 1943 - (Government of Alberta, 1970)

Preliminary biological survey of Six Lakes in Northern Alberta - Alberta. Dept. of Lands; Forests. Fish; Wildlife Division. Fisheries Section, (Government of Alberta, 1970)

A preliminary biological survey of waters in the Birch Mountains, Alberta - Alberta. Fish; Wildlife Division. (Fish & Wildlife Division, Dept. of Lands and Forests, 1968)

Preliminary list of deep water Crustacea in Green Lake - Marsh, C. Dwight (Charles Dwight), 1855 -1932 (Akademische Verlagsgesellschaft Geest & Portig, 1891)

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)

Preliminary surveys of Sulphur and Cutbank Lakes : Peace River region - Alberta. Dept. of Lands; Forests. Fish; Wildlife Division. Fisheries Section, (Government of Alberta, 1970)

The preparation & mounting of microscopic objects - Davies, Thomas (R. Hardwicke, 1863)

President's address and the sectional addresses. 1831 - British Association for the Advancement of Science. (1896)

Principles of animal biology - Shull, A. Franklin (Aaron Franklin), 1881 -1961 (McGraw-Hill, 1920)

Principles of animal biology - Larue, George R. 1882 - (McGraw-Hill book company, inc, 1946)

Principles of animal ecology - Allee, W. C. (Warder Clyde), 1885 -1955 (Saunders Co, 1949)

The principles of applied zoology - Wardle, Robert A. (Robert Arnold), 1890 -1974 (Longmans, Greem, and co, 1929)

The principles of biology - Spencer, Herbert, 1820 -1903 (D. Appleton, 1899)

The principles of biology - Spencer, Herbert, 1820 -1903 (D. Appleton, 1897)

The principles of biology - Spencer, Herbert, 1820 -1903 (D. Appleton and Company, 1881)

The principles of biology - Spencer, Herbert, 1820 -1903 (D. Appleton and Co, 1874)

The principles of biology - Spencer, Herbert, 1820 -1903 (D. Appleton and company, 1914)

The principles of biology - Spencer, Herbert, 1820 -1903 (D. Appleton, 1910)

The principles of biology - Spencer, Herbert, 1820 -1903 (D. Appleton and company, 1896)

The principles of biology - Spencer, Herbert, 1820 -1903 (D. Appleton, 1896)

The principles of biology - Spencer, Herbert, 1820 -1903 (D. Appleton and company, 1898)

Principles of comparative physiology - Carpenter, William Benjamin, 1813 -1885 (John Churchill, 1854)