Ornithologische Monatsschrift - Deutscher Verein zum Schutze der Vogelwelt. (Kommissions-Verlag der Creutschen Verlagsbuchhandlung, 1921)

Ornithologischer Beitrag zur Fauna Groenlands - Holboell, Carl. (E. Fleischer, 1854)

Ornithologischer Beitrag zur Fauna Groenlands - Paulsen, J. H., Dr., (Ernst Fleischer, 1846)

Ornithologisches Centralblatt (L.A. Kittler, 1878)

Ornithologisches Centralblatt (L.A. Kittler, 1879)

Ornithologisches Jahrbuch (V. Tschusi, 1890)

Ornithologisches Jahrbuch (V. Tschusi, 1892)

Ornithologisches Jahrbuch (V. Tschusi, 1894)

Ornithologisches Jahrbuch (V. Tschusi, 1895)

Ornithologisches Jahrbuch (V. Tschusi, 1896)

Ornithologisches Jahrbuch (V. Tschusi, 1898)

Ornithologisches Jahrbuch (V. Tschusi, 1900)

Ornithologisches Jahrbuch (V. Tschusi, 1901)

Ornithologisches Jahrbuch (V. Tschusi, 1902)

Ornithologisches Jahrbuch (V. Tschusi, 1903)

Ornithologisches Jahrbuch (V. Tschusi, 1908)

Ornithologisches Jahrbuch (V. Tschusi, 1909)

Ornithologisches Jahrbuch (V. Tschusi, 1910)

Ornithologisches Jahrbuch (V. Tschusi, 1911)

Ornithologisches Jahrbuch (V. Tschusi, 1913)

Ornithologisches Jahrbuch (V. Tschusi, 1915)

Ornithologiske bemaerkninger til Norges fauna ... (Indberetning til det Academiske collegium ved det Kongelige Frederiks universitet - Collett, Robert, 1842 -1913 (J. Dahl, 1871)

The Ornithologist; a magazine of ornithology and oölogy First series - Swann, H. Kirke (Harry Kirke), 1871 -1926 (John Bale & Sons, 1896)

The Ornithologist and oölogist (1883)

The Ornithologist and oölogist (1887)

Ornithology and oo¨logy of New England: containing full descriptions of the birds of New England, and adjoining states and provinces - Samuels, Edward A. (Edward Augustus), 1836 -1908 (Nichols and Noyes, 1867)

Ornithology and oölogy of New England: containing full descriptions of the birds of New England, and adjoining states and provinces ... - Samuels, Edward A. (Edward Augustus), 1836 -1908 (Nichols and Noyes, 1867)

Ornithology and oölogy of New England containing full descriptions of the birds of New England and adjoining states and provinces, arranged by a long-approved classification and nomenclature : together with a complete history of their habits, times of arrival and departure ... : with illustrations of many species of the birds and accurate figures of their eggs - Samuels, Edward A. (Edward Augustus), 1836 -1908 (Nichols and Noyes, 1867)

The ornithology of Illinois - Ridgway, Robert, 1850 -1929 (H.W. Rokker, printer, 1889)

The ornithology of Illinois. Part I. Descriptive catalogue - Ridgway, Robert, 1850 -1929 (H. W. Rokker, Printer, 1889)

The ornithology of Illinois - Ridgway, Robert, 1850 -1929 (H. W. Rokker, printer, 1889)

The ornithology of Illinois - Ridgway, Robert, 1850 -1929 (H.W. Rokker, printer, 1913)

The ornithology of Illinois - Ridgway, Robert, 1850 -1929 (H.W. Rokker, printer, 1885)

Ornitologia italiana : opera postuma - Savi, Paul, 1798 -1871 (Successori Le Monnier, 1873)

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)

Osteology of birds - Shufeldt, Robert Wilson 1850 -1934 (University of the State of New York, 1909)

Die österreichische Polarstation Jan Mayen, ausgerüstet durch Graf Hanns Wilczek, geleitet vom Emil Edlen von Wohlgemuth. Beobachtungs-Ergebnisse, hrsg. von der Kaiserlichen Akademie der Wissenschaften - International Polar Expedition 1882 -1883 (In Commission bei K. Gerold's Sohn, 1886)

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

Our birds in their haunts : a popular treatise on the birds of eastern North America - Langille, J. H. (James Hibbert), 1841 -1923 (Orange Judd, 1892)

Our birds in their haunts : a popular treatise on the birds of Eastern North America - Langille, J. H. (S. E. Cassino, 1884)

Our birds in their haunts: a popular treatise on the birds of eastern North America - Langille, J. H. (Orange Judd Co, 1892)

Our birds in their haunts a popular treatise on the birds of eastern North America - Langille, J. H. (James Hibbert), 1841 -1923 (S.E. Cassino, 1884)

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 feathered game; a handbook of the North American game birds - Huntington, Dwight W. (Dwight Williams), 1851 -1938 (C. Scribner's Sons, 1911)

Our feathered game : a handbook of the North American game birds - Huntington, Dwight W. (Dwight Williams), 1851 -1938 (C. Scribner's Sons, 1911)

Our feathered game; a handbook of the North American game birds - Huntington, Dwight W. (Dwight Williams), 1851 -1938 (C. Scribner's Sons, 1903)

Our living resources : a report to the nation on the distribution, abundance, and health of U.S. plants, animals, and ecosystems - United States. National Biological Service. (U.S. Dept. of the Interior, National Biological Service, 1995)

Our living world; an artistic edition of the Rev. J. G. Wood's Natural history of animate creation - Wood, J. G. (John George), 1827 -1889 (S. Hess, 1885)

Our migrant birds and how to know them - Elms, E. F. M. (Thornton Butterworth, 1922)

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 rarer birds : being studies in ornithology & oology - Dixon, Charles, 1858 -1926 (Bentley, 1888)

Our rarer birds, being studies in ornithology & oology - Dixon, Charles, 1858 -1926 (R. Bentley, 1888)

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

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, 1881)

Pacific coast avifauna - Cooper Ornithological Club. (Cooper Ornithological Club, 1909)

Pacific coast avifauna - Cooper Ornithological Club. (Cooper Ornithological Club, 1913)

Pacific science - University of Hawaii. (University Press of Hawaii, 1967)

Pacific seabirds : a publication of the Pacific Seabird Group - Pacific Seabird Group. (The Group, 1999)

Pacific seabirds : a publication of the Pacific Seabird Group - Pacific Seabird Group. (The Group, 2000)

Pacific seabirds : a publication of the Pacific Seabird Group - Pacific Seabird Group. (The Group, 2002)

Pacific seabirds : a publication of the Pacific Seabird Group - Pacific Seabird Group. (The Group, 2003)

Pacific seabirds : a publication of the Pacific Seabird Group - Pacific Seabird Group. (The Group, 2004)

Pacific seabirds : a publication of the Pacific Seabird Group - Pacific Seabird Group. (The Group, 2006)

Pacific seabirds : a publication of the Pacific Seabird Group - Pacific Seabird Group. (The Group, 2008)

Pacific seabirds : a publication of the Pacific Seabird Group - Pacific Seabird Group. (The Group, 2010)

Pacific seabirds : a publication of the Pacific Seabird Group - Pacific Seabird Group. (The Group, 2011)

Pacific seabirds : a publication of the Pacific Seabird Group - Pacific Seabird Group. (The Group, 2012)

Pacific seabirds : a publication of the Pacific Seabird Group - Pacific Seabird Group. (The Group, 2013)

Pacific seabirds : a publication of the Pacific Seabird Group - Pacific Seabird Group. (The Group, 2015)

Pacific seabirds : a publication of the Pacific Seabird Group - Pacific Seabird Group. (The Group, 2016)

Palaeontology - Palaeontological Association (Palaeontological Association, 1989)

Palaeontology - Palaeontological Association (Palaeontological Association, 1994)

Pamietnik Fizyjograficzny (Druk K. Kowalewskiego, 1888)

Pamietnik Fizyjograficzny (Druk K. Kowalewskiego, 1918)

Papers and published notes : 1869 to 1876 - Goode, G. Brown (George Brown), 1851 -1896 (1869)

Parasitology - British Society for Parasitology. (Cambridge University Press, 1911)

Parasitology (Cambridge University Press, 1922)

P.D. Skaar's Montana bird distribution - Skaar, Palmer David. (Montana Natural Heritage Program, 2003)

Pearls & parasites - Shipley, A. E. Sir, (Arthur Everett), 1861 -1927 (Murray, 1908)

Pennaraptoran theropod dinosaurs : past progress and new frontiers - Novas, Fernando E (American Museum of Natural History, 2020)

Pesticides monitoring journal - United States. Chemical Information Division. (Technical Services Division, Office of Pesticide Programs, U.S. Environmental Protection Agency, 1977)

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

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

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)

Polar bear foraging behavior during the ice-free period in western Hudson Bay : observations, origins, and potential significance - Rockwell, Robert F. (American Museum of Natural History, 2017)

A popular handbook of the birds of Canada and the United States - Nuttall, Thomas, 1786 -1859 (Musson Book Co, 1907)

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

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

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)

Popular natural history : a description of animal life, from the lowest forms up to man - Kingsley, J. S. (John Sterling), 1854 -1929 (Estes & Lauriat, 1890)

The Popular science monthly - Harry Houdini Collection (Library of Congress) (Popular Science Pub. Co., etc, 1900)

A popular zoology - Jenks, J. W. P. 1819 -1894 (A.S. Barnes & Company, 1887)