Nuova flora analitica d'Italia, contenente la descrizione delle piante vascolari indigene inselvatichite e largamente coltivate in Italia - Fiori, Adriano 1865 -1950 (Tipografia di M. Ricci, 1923)

Nuova flora analitica d'Italia, contenente la descrizione delle piante vascolari indigene inselvatichite e largamente coltivate in Italia - Fiori, Adriano 1865 -1950 (Tipografia di M. Ricci, 1925)

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)

Observations on intertidal organism associations of St. Catherines Island, Georgia. 2, Morphology and distribution of Littorina irrorata (Say) - Rollins, Harold B., 1939 - (American Museum of Natural History, 1987)

Occasional papers - San Diego Society of Natural History. (San Diego Society of Natural History, 1949)

Oceanic birds of South America : a study of species of the related coasts and seas, including the American quadrant of Antarctica, based upon the Brewster-Sanford collection in the American Museum of Natural History - Jaques, Francis Lee, 1887 -1969 (Macmillan Co, 1936)

Oceanus - Woods Hole Oceanographic Institution. (Woods Hole Oceanographic Institution, 1973)

Oceanus - Woods Hole Oceanographic Institution. (Woods Hole Oceanographic Institution, 1976)

Oceanus - Woods Hole Oceanographic Institution. (Woods Hole Oceanographic Institution, 1977)

Oceanus - Woods Hole Oceanographic Institution. (Woods Hole Oceanographic Institution, 1980)

Oceanus - Woods Hole Oceanographic Institution. (Woods Hole Oceanographic Institution, 1981)

Oceanus - Woods Hole Oceanographic Institution. (Woods Hole Oceanographic Institution, 1993)

Oceanus - Woods Hole Oceanographic Institution. (Woods Hole Oceanographic Institution, 1996)

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Oesterreichische botanische Zeitschrift (A. Skofitz, 1874)

Oesterreichische botanische Zeitschrift (A. Skofitz, 1882)

Oesterreichische botanische Zeitschrift (A. Skofitz, 1885)

Oesterreichische botanische Zeitschrift (A. Skofitz, 1897)

Oesterreichische botanische Zeitschrift (A. Skofitz, 1898)

Oesterreichische botanische Zeitschrift (A. Skofitz, 1902)

Oesterreichische botanische Zeitschrift (A. Skofitz, 1906)

Oesterreichische botanische Zeitschrift (A. Skofitz, 1907)

The Ohio journal of science - Ohio Academy of Science. (Ohio Academy of Science, 1909)

The Ohio journal of science - Ohio Academy of Science. (Ohio Academy of Science, 1912)

The Ohio naturalist - Ohio Academy of Science. (Biological Club of the Ohio State University, 1912)

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Ontogeny and systematics of fishes : based on an international symposium dedicated to the memory of Elbert Halvor Ahlstrom - United States. National Marine Fisheries Service. (American Society of Ichthyologists and Herpetologists, 1984)

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

Opuscula philolichenum (J. Lendemer, 2015)

Opuscules de botanique (1862-1873) - Jussieu, Antoine Laurent de, 1748 -1836 (1875)

Orchard fruits in the Piedmont and Blue Ridge regions of Virginia and the South Atlantic States - Gould, H. P. (1911)

Original notebooks of the botanist, volumes 1 - 4, Peru - Brackenridge, William D. (William Dunlop), 1810 -1893 (1838)

Orthoptera of Maine - Morse, Albert P. (Albert Pitts), 1863 -1936 (Maine Agricultural Experiment Station, 1921)

Orthoptera of northeastern America : with especial reference to the faunas of Indiana and Florida - Blatchley, W. S. (Willis Stanley), 1859 -1940 (Nature Pub. Co., 1920, 1920)

Orthoptera of northeastern America, with especial reference to the faunas of Indiana and Florida - Blatchley, W. S. (Willis Stanley), 1859 -1940 (The Nature Publishing Company, 1920)

The Ottawa naturalist - Ottawa Field-Naturalists' Club (Ottawa Field-Naturalists' Club, 1910)

The Ottawa naturalist - Ottawa Field-Naturalists' Club (Ottawa Field-Naturalists' Club, 1913)

The Ottawa naturalist - Ottawa Field-Naturalists' Club (Ottawa Field-Naturalists' Club, 1916)

The Ottawa naturalist - Ottawa Field-Naturalists' Club (Ottawa Field-Naturalists' Club, 1915)

Outlines of botany for the high school laboratory and classroom (based on Gray's Lessons in botany) - Leavitt, Robert Greenleaf, 1865 - (American Book Co, 1901)

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The Pan-Pacific entomologist - Van Duzee, Edward P. (Edward Payson), 1861 -1940 (Pacific Coast Entomological Society, 1991)

The Pan-Pacific entomologist - Van Duzee, Edward P. (Edward Payson), 1861 -1940 (Pacific Coast Entomological Society, 1995)

Papers on national land use policy issues. Prepared for the Committee on Interior and Insular Affairs, United States Senate - Woods Hole Oceanographic Institution. (U.S. Govt. Print. Off, 1971)

Parasitic fungi of Illinois / by T.J. Burrill - Earle, F. S. (Franklin Sumner), 1856 -1929 (J. W. Franks, 1885)

Part I. The living flora of West Virginia - Millspaugh, Charles Frederick, 1854 -1923 (Wheeling news litho. co, 1913)

Pasture, meadow, and forage crops in Nebraska - Hitchcock, A. S. (Albert Spear), 1865 -1935 (G.P.O, 1904)

Patterson's numbered check-list of North American plants north of Mexico - Patterson, Harry N. (Harry Norton), 1853 -1919 (Patterson, 1892)

Paxton's Botanical dictionary; comprising the names, history, and culture of all plants known in Britain; with a full explanation of technical terms. New ed. including all the new plants up to the present year - Paxton, Joseph, Sir, 1803 -1865 (Bradbury, Evans, & co, 1868)

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Pflanzen-teratologie systematisch geordnet - Penzig, O. (Ottone), 1856 -1929 (A. Ciminago, 1894)

Die Pflanzenwelt Afrikas, insbesondere seiner tropischen Gebiete : Grundzge der Pflanzenverbreitung im Afrika und die Charakterpflanzen Afrikas - Engler, Adolf, 1844 -1930 (W. Engelman, 1910)

Phalaridea - Trinius, Carl Bernhard, 1778 -1844 (Typis Academiae Caesareae Scientiarum, 1839)

Phanerogamic flora of the divisions of Uitenhage and Port Elizabeth : with a sketch map - Schönland, S. 1860 - (Govt. Print. and Stationery Office, 1919)

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The Philosophical magazine and journal : comprehending various branches of science, the liberal and fine arts, agriculture, manufactures, and commerce (R. Taylor, 1824)

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Phytogeographic survey of North America. A consideration of the phytogeography of the North American continent, including Mexico, Central America and the West Indies, together with the evolution of North American plant distribution - Harshberger, John W. (John William), 1869 -1929 (W. Engelmann, 1911)

Phytogeography of Nebraska. 1. General survey by Roscoe Pound and Frederic E. Clements - Clements, Frederic E. (Frederic Edward), 1874 -1945 (Published by the Seminar, 1900)

Phytologia - Moldenke, Harold N. (Harold Norman), 1909 -1996 (H.A. Gleason and H.N. Moldenke, 1964)

Phytologia - Moldenke, Harold N. (Harold Norman), 1909 -1996 (H.A. Gleason and H.N. Moldenke, 1968)