The Osprey (The Osprey Co, 1896)

Osteologia avium, or, A sketch of the osteology of birds - Brooks, Vincent, 1815? -1885 (Published by R. Hobson, Wellington, Salop, 1867)

Osteologia avium : or a sketch of the osteology of birds - Eyton, T. C. (Thomas Campbell), 1809 -1880 (Salop, R. Hobson)

Our country's birds and how to know them. A guide to all the birds of Great Britain - Gordon, W. J. (Simpkin, Marshall, Hamilton, Kent, 1892)

Our northern and eastern birds : containing descriptions of the birds of the northern and eastern states and British provinces; together with a history of their habits, times of arrival and departure, their distribution, food, song, time of breeding, and a careful and accurate description of their nests and eggs - Samuels, Edward A. (Edward Augustus), 1836 -1908 (R. Worthington, 1883)

Our northern and eastern birds. Containing descriptions of the birds of the northern and eastern states and British provinces; together with a history of their habits, times of arrival and departure, their distribution, food, song, time of breeding, and a careful and accurate description of their nests and eggs ... - Samuels, Edward A. (Edward Augustus), 1836 -1908 (R. Worthington, 1883)

Our northern and eastern birds containing descriptions of the birds of the northern and eastern states and British provinces, together with a history of their habits, times of arrival and departure, their distribution, food, song, time of breeding, and a careful and accurate description of their nests and eggs ; with illustrations of many species of the birds and accurate figures of their eggs - Samuels, Edward A. (Edward Augustus), 1836 -1908 (R. Worthington, 1883)

Our resident birds and how to know them - Elms, E. F. M. (T. Butterworth, 1921)

Outlines of comparative anatomy of vertebrates - Kingsley, J. S. (John Sterling), 1854 -1929 (P. Blakiston, 1917)

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

Oversigt af Christiania omegns ornithologiske fauna - Collett, Robert, 1842 -1913 (J. Dahl, 1864)

Palearctic Migratory Bird Survey, survey records, 1966-1973 : skeletons numeric list (1966)

Palestine : the physical geography and natural history of the Holy Land - Kitto, John, 1804 -1854 (Charles Knight, 1841)

Pamietnik Fizyjograficzny (Druk K. Kowalewskiego, 1888)

Pamietnik Fizyjograficzny (Druk K. Kowalewskiego, 1918)

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

Parasitology - British Society for Parasitology. (Cambridge University Press, 1916)

Perechen ptitz rossii skoi imperii Conspectus avium Imperii Rossici - Bogdanov, Modest Nikolaevich, 1841 -1888 (Commissionaires de l'Académie Impériale des Sciences, 1884)

Pesticides monitoring journal - United States. Chemical Information Division. (Technical Services Division, Office of Pesticide Programs, U.S. Environmental Protection Agency, 1978)

Pfarrer P. Blasius Hanf als Ornitholog. Dargestellt vorzüglich auf Grundlage der Schriften desselben - Schaffer, Alexander. (Im Selbstverlag der Benediktiner-Abtei, 1904)

Die Pflanzenwelt Deutschlands; Lehrbuch der Formations- biologie. Eine Darstellung der Lebensgeschichte der wildwachsenden Pflanzenvereine und der Kulturflächen - Graebner, Paul, 1871 -1933 (Quelle & Meyer, 1909)

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

Pflügers Archiv für die gesamte Physiologie des Menschen und der Tiere (M. Hager, 1921)

Philippine birds - Du Pont, John E. (John Eleuthère), 1938 -2010 ([Delaware Museum of Natural History], 1971)

The Philippine journal of science - Philippines. National Science Development Board. (Bureau of Science, 1918)

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

Philosophical transactions of the Royal Society of London - Royal Society (Great Britain) (Royal Society of London, 1767)

Philosophical transactions of the Royal Society of London - Royal Society (Great Britain) (Royal Society of London, 1885)

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

The Phoenix - Jennings, Michael C. (M.C. Jennings, 1991)

The Phoenix - Jennings, Michael C. (M.C. Jennings, 1996)

The Phoenix - Jennings, Michael C. (M.C. Jennings, 1997)

The Phoenix - Jennings, Michael C. (M.C. Jennings, 2003)

The Phoenix - Jennings, Michael C. (M.C. Jennings, 2004)

The Phoenix - Jennings, Michael C. (M.C. Jennings, 2005)

The Phoenix - Jennings, Michael C. (M.C. Jennings, 2008)

The Phoenix - Jennings, Michael C. (M.C. Jennings, 2010)

The Phoenix - Jennings, Michael C. (M.C. Jennings, 2012)

The Phoenix - Jennings, Michael C. (M.C. Jennings, 2013)

The Phoenix - Jennings, Michael C. (M.C. Jennings, 2014)

Physiologie du mouvement : le vol des oiseaux - Marey, Etienne-Jules, 1830 -1904 (G. Masson, éditeur, libraire de l'Académie de médecine, 1890)

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

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

Planches coloriees des oiseaux de la Belgique et de leurs oeufs - Dubois, Ch. F. (Charles Frédéric), 1804 -1867 (C. Muquardt, 1854)

The Plant world - Plant World Association. (Plant World Association [etc.], 1904)

Pleistocene birds of the palearctic : a catalogue - Nuttall Ornithological Club. (Nuttall Ornithological Club, 1998)

A pocket-book of British birds - Elms, E. F. M. (West, Newman & co. [etc.], 1906)

Les poissons des côtes de Belgique : leurs parasites et leurs commensaux - Académie royale des sciences, des lettres et des beaux-arts de Belgique. (M. Hayez, Imprimeur de l'academie royale de Belgique, 1870)

Popular British ornithology : containing a familiar and technical description of the birds of the British Isles - Gosse, Philip Henry, 1810 -1888 (Reeve, Benham, and Reeve, 1849)

Popular British ornithology : containing a familiar and technical description of the birds of the British Isles - Gosse, Philip Henry, 1810 -1888 (Reeve and co, 1853)

A popular handbook of the birds of the United States and Canada - Nuttall, Thomas, 1786 -1859 (Little, Brown, 1903)

A popular handbook of the birds of the United States and Canada - Nuttall, Thomas, 1786 -1859 (Little, Brown, 1921)

A popular handbook of the birds of the United States and Canada - Nuttall, Thomas, 1786 -1859 (Little, Brown, 1919)

A popular handbook of the birds of the United States and Canada - Nuttall, Thomas, 1786 -1859 (Little, Brown, 1905)

A popular handbook of the ornithology of eastern North America - Nuttall, Thomas, 1786 -1859 (Little, Brown, 1891)

A popular Handbook of the Ornithology of Eastern North America - Nuttall, Thomas, 1786 -1859 (Truslove and Hanson, 1894)

A popular handbook of the ornithology of eastern North America - Nuttall, Thomas, 1786 -1859 (Little, Brown, and Company, 1897)

A popular handbook of the ornithology of the United States and Canada, based on Nuttall's Manual - Nuttall, Thomas, 1786 -1859 (Little, Brown, and Company, 1891)

A popular history of British birds' eggs - Laishley, Richard. (L. Reeve, 1858)

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)

Postilla - Peabody Museum of Natural History. (Peabody Museum of Natural History, 1962)

Postilla - Peabody Museum of Natural History. (Peabody Museum of Natural History, 1968)

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

Praktische Naturgeschichte der Vögel, für Gebildete aller Stände - Reichenbach, A. B. (Anton Benedikt), 1807 -1880 (1850)

Pre-historic times - Lubbock, John, Sir, 1834 -1913 (Williams and Norgate, 1865)

Pre-historic times, as illustrated by ancient remains and the manners and customs of modern savages - Lubbock, John, Sir, 1834 -1913 (D. Appleton and company, 1892)

A preliminary catalog of the birds of Missouri - Widmann, Otto (Academy of Science of St. Louis, 1907)

A preliminary catalog of the birds of Missouri - Widmann, Otto (Academy of Sciences of St. Louis?, 1907)

Il Primo Congresso ornitologico internazionale tenuto a Vienna dal 7 al 14 aprile 1884 - Giglioli, Enrico Hillyer, 1845 -1909 (1885)

Primo resoconto dei risultati della inchiesta ornitologica in Italia ... - Giglioli, Enrico Hillyer, 1845 -1909 (Coi tipi dei successori Le Monnier, 1889)