Ornithologische Monatsschrift - Deutscher Verein zum Schutze der Vogelwelt. (Kommissions-Verlag der Creutschen Verlagsbuchhandlung, 1912)

Ornithologische Monatsschrift - Deutscher Verein zum Schutze der Vogelwelt. (Kommissions-Verlag der Creutschen Verlagsbuchhandlung, 1913)

Ornithologische Monatsschrift - Deutscher Verein zum Schutze der Vogelwelt. (Kommissions-Verlag der Creutschen Verlagsbuchhandlung, 1914)

Ornithologische Monatsschrift - Deutscher Verein zum Schutze der Vogelwelt. (Kommissions-Verlag der Creutschen Verlagsbuchhandlung, 1915)

Ornithologische Monatsschrift - Deutscher Verein zum Schutze der Vogelwelt. (Kommissions-Verlag der Creutschen Verlagsbuchhandlung, 1904)

Ornithologische Monatsschrift - Deutscher Verein zum Schutze der Vogelwelt. (Kommissions-Verlag der Creutschen Verlagsbuchhandlung, 1906)

Ornithologische Monatsschrift - Deutscher Verein zum Schutze der Vogelwelt. (Kommissions-Verlag der Creutschen Verlagsbuchhandlung, 1916)

Ornithologische Monatsschrift - Deutscher Verein zum Schutze der Vogelwelt. (Kommissions-Verlag der Creutschen Verlagsbuchhandlung, 1918)

Ornithologisches Centralblatt (L.A. Kittler, 1879)

Ornithologisches Centralblatt (1882)

Ornithologisches Jahrbuch (V. Tschusi, 1890)

Ornithologisches Jahrbuch (V. Tschusi, 1891)

Ornithologisches Jahrbuch (V. Tschusi, 1893)

Ornithologisches Jahrbuch (V. Tschusi, 1894)

Ornithologisches Jahrbuch (V. Tschusi, 1896)

Ornithologisches Jahrbuch (V. Tschusi, 1897)

Ornithologisches Jahrbuch (V. Tschusi, 1898)

Ornithologisches Jahrbuch (V. Tschusi, 1899)

Ornithologisches Jahrbuch (V. Tschusi, 1901)

Ornithologisches Jahrbuch (V. Tschusi, 1902)

Ornithologisches Jahrbuch (V. Tschusi, 1903)

Ornithologisches Jahrbuch (V. Tschusi, 1904)

Ornithologisches Jahrbuch (V. Tschusi, 1905)

Ornithologisches Jahrbuch (V. Tschusi, 1906)

Ornithologisches Jahrbuch (V. Tschusi, 1907)

Ornithologisches Jahrbuch (V. Tschusi, 1909)

Ornithologisches Jahrbuch (V. Tschusi, 1911)

Ornithologisches Jahrbuch (V. Tschusi, 1912)

Ornithologisches Jahrbuch (V. Tschusi, 1913)

Ornithologisches Jahrbuch (V. Tschusi, 1914)

Ornithologisches Jahrbuch (V. Tschusi, 1915)

Ornithologisches Jahrbuch (V. Tschusi, 1917)

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

The ornithology of Chester County, Pennsylvania - Burns, Frank L. (Franklin Lorenzo), 1869 -1946 (R. G. Badger, 1919)

The ornithology of Shakespeare. Critically examined, explained, and illustrated - Harting, James Edmund, 1841 -1928 (J. Van Voorst, 1871)

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

Ornitologia toscana; ossia, Descrizione e storia degli uccelli che trovansi nella Toscana, con l'aggiunta della descrizioni di tutti gli altri proprj al rimanente d'Italia - Savi, Paul, 1798 -1871 (Dalla tipografia Nistri, 1827)

L'Ornitologo Ticinese ossia manuale descrittivo gli Uccelli di stazione e di passaggio nel Cantone Ticino, &c - Riva, Antonio. (1865)

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)

Osteology of living and fossil new world quail - Holman, J. Alan, 1931 -2006 (1961)

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

Outlines of creation - Noyce, Elisha. (Ward & Lock, 1858)

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

Pacific coast avifauna - Cooper Ornithological Club. (Cooper Ornithological Club, 1915)

Pacific science - University of Hawaii. (University Press of Hawaii, 1968)

Pamietnik Fizyjograficzny (Druk K. Kowalewskiego, 1918)

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

Parasitology (Cambridge University Press, 1921)

P.D. Skaar's Montana bird distribution - Montana Natural Heritage Program. (Montana Natural Heritage Program, 2012)

P.D. Skaar's Montana bird distribution - Bergeron, Dwight. (Montana Natural Heritage Program, 1992)

P.D. Skaar's Montana bird distribution - Skaar, Palmer David. (Montana Natural Heritage Program, 1996)

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

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

Pesticides monitoring journal - United States. Chemical Information Division. (Technical Services Division, Office of Pesticide Programs, U.S. Environmental Protection Agency, 1981)

Pesticides monitoring journal - United States. Chemical Information Division. (Technical Services Division, Office of Pesticide Programs, U.S. Environmental Protection Agency, 1968)

Pesticides monitoring journal - United States. Chemical Information Division. (Technical Services Division, Office of Pesticide Programs, U.S. Environmental Protection Agency, 1970)

Pesticides monitoring journal - United States. Chemical Information Division. (Technical Services Division, Office of Pesticide Programs, U.S. Environmental Protection Agency, 1973)

Pesticides monitoring journal - United States. Chemical Information Division. (Technical Services Division, Office of Pesticide Programs, U.S. Environmental Protection Agency, 1975)

Pesticides monitoring journal - United States. Chemical Information Division. (Technical Services Division, Office of Pesticide Programs, U.S. Environmental Protection Agency, 1967)

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

Pets and how to care for them - Crandall, Lee S. (Lee Saunders), 1887 -1969 (New York zoological park, 1921)

Pets; their history and care - Crandall, Lee S. (Lee Saunders), 1887 -1969 (H. Holt and company, 1917)

Pets : their history and care. With illus. from life - Crandall, Lee S. (Lee Saunders), 1887 -1969 (Holt, 1917)

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)

Pheasant farming - Horsfall, R. Bruce 1869 -1948 (State Printing Dept, 1914)

Pheasant farming; containing general information about pheasants, with instructions how to raise them - Simpson, Eugene Milton, 1871 - (Press of Benton County Republican, 1908)

Pheasant keeping for amateurs; a practical handbook on the breeding, rearing, and general management of aviary pheasants - Horne, George. (L. Upcott Gill, 1887)

The pheasant. Natural history - Thorburn, Archibald, 1860 -1935 (Longmans, Green, and Co, 1895)

Pheasants: their natural history and practical management - Tegetmeier, W. B. (William Bernhard), 1816 -1912 (Horace Cox, 1881)

Pheasants; their natural history and practical management - Tegetmeier, W. B. (William Bernhard), 1816 -1912 (H. Cox, 1911)

Pheasants : their natural history and practical management - Tegetmeier, W. B. (William Bernhard), 1816 -1912 (H. Cox, 1897)

Pheasants; their natural history and practical management - Tegetmeier, W. B. (William Bernhard), 1816 -1912 (H. Cox, 1904)

Pheasants : their natural history and practical management - Tegetmeier, W. B. (William Bernhard), 1816 -1912 (Field press, 1922)

Pheasants; their natural history and practical management - Tegetmeier, W. B. (William Bernhard), 1816 -1912 (Field Press, 1922)