De vogels van Guyana (Suriname, Cayenne en Demerara) - Penard, Arthur Philip (E.P. Penard, 1910)

Der vollständige Vögelsang : Eine gründliche Anleitung alle europaischen Vögel - Brehm, L. (Ludwig), 1787 -1864 (B. Voigt, 1855)

The voyage of the "Challenger." The Atlantic; a preliminary account of the general results of the exploring voyage of H.M.S. "Challenger" during the year 1873 and the early part of the year 1876 - Thomson, C. Wyville, Sir, (Charles Wyville), 1830 -1882 (Harper & Brothers, 1878)

Ward's natural science bulletin - Ward's Natural Science Establishment, inc. (Ward's Natural Science Establishment, 1882)

Waste-land wanderings - Abbott, Charles Conrad, 1843 -1919 (Harper, 1887)

Waste-land wanderings - Abbott, Charles Conrad, 1843 -1919 (Harper & brothers, 1887)

Waste-land wanderings - Abbott, Charles Conrad, 1843 -1919 (Harper & Brothers, 1887)

Waterfowl production and initial effects of fire on wetlands in the Pah River Flats : final report - Jandt, R. R. (Randi R.) (U.S. Department of the Interior, Bureau of Land Management, Alaska State Office, 1996)

West Virginia birds : distribution and ecology - Hall, George A. (Carnegie Museum of Natural History, 1983)

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Western birds - California Field Ornithologists. (California Field Ornithologists, 1981)

Western birds - California Field Ornithologists. (California Field Ornithologists, 1984)

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Western birds - California Field Ornithologists. (California Field Ornithologists, 1989)

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Western birds - California Field Ornithologists. (California Field Ornithologists, 2003)

Western birds - California Field Ornithologists. (California Field Ornithologists, 2004)

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Western birds - Myers, Harriet Williams. (The Macmillan company, 1922)

What bird is that? A pocket museum of the land birds of the eastern United States, arranged according to season - Chapman, Frank M. (Frank Michler), 1864 -1945 (D. Appleton, 1920)

Wild birds in city parks; being hints on identifying 200 birds, prepared primarily for the spring migration in Lincoln Park, Chicago, but adapted to other localities - Walter, Alice Hall. (Press of the St. Johnsbury republican co.], 1910)

Wild life in Canada - Buchanan, Angus, 1886 -1954 (McClelland, Goodchild and Stewart, 1920)

Wild life in Canada - Buchanan, Angus, 1886 -1954 (F. A. Stokes, 1920)

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The Wilson bulletin - Agassiz Association. Wilson Ornithological Chapter. (Wilson Ornithological Society, 1901)

The Wilson bulletin - Agassiz Association. Wilson Ornithological Chapter. (Wilson Ornithological Society, 1902)

The Wilson bulletin - Agassiz Association. Wilson Ornithological Chapter. (Wilson Ornithological Society, 1903)

The Wilson bulletin - Agassiz Association. Wilson Ornithological Chapter. (Wilson Ornithological Society, 1904)

The Wilson bulletin - Agassiz Association. Wilson Ornithological Chapter. (Wilson Ornithological Society, 1905)

The Wilson bulletin - Agassiz Association. Wilson Ornithological Chapter. (Wilson Ornithological Society, 1906)

The Wilson bulletin - Agassiz Association. Wilson Ornithological Chapter. (Wilson Ornithological Society, 1907)

The Wilson bulletin - Agassiz Association. Wilson Ornithological Chapter. (Wilson Ornithological Society, 1908)

The Wilson bulletin - Agassiz Association. Wilson Ornithological Chapter. (Wilson Ornithological Society, 1909)

The Wilson bulletin - Agassiz Association. Wilson Ornithological Chapter. (Wilson Ornithological Society, 1910)

The Wilson bulletin - Agassiz Association. Wilson Ornithological Chapter. (Wilson Ornithological Society, 1911)

The Wilson bulletin - Agassiz Association. Wilson Ornithological Chapter. (Wilson Ornithological Society, 1912)

The Wilson bulletin - Agassiz Association. Wilson Ornithological Chapter. (Wilson Ornithological Society, 1914)

The Wilson bulletin - Agassiz Association. Wilson Ornithological Chapter. (Wilson Ornithological Society, 1915)

The Wilson bulletin - Agassiz Association. Wilson Ornithological Chapter. (Wilson Ornithological Society, 1916)

The Wilson bulletin - Agassiz Association. Wilson Ornithological Chapter. (Wilson Ornithological Society, 1917)

The Wilson bulletin - Agassiz Association. Wilson Ornithological Chapter. (Wilson Ornithological Society, 1919)

The Wilson bulletin - Agassiz Association. Wilson Ornithological Chapter. (Wilson Ornithological Society, 1920)

The Wilson bulletin - Agassiz Association. Wilson Ornithological Chapter. (Wilson Ornithological Society, 1922)

The Wilson bulletin - Agassiz Association. Wilson Ornithological Chapter. (Wilson Ornithological Society, 1924)

The Wilson bulletin - Agassiz Association. Wilson Ornithological Chapter. (Wilson Ornithological Society, 1927)

The Wilson bulletin - Agassiz Association. Wilson Ornithological Chapter. (Wilson Ornithological Society, 1928)

The Wilson bulletin - Agassiz Association. Wilson Ornithological Chapter. (Wilson Ornithological Society, 1929)

The Wilson bulletin - Agassiz Association. Wilson Ornithological Chapter. (Wilson Ornithological Society, 1930)

The Wilson bulletin - Agassiz Association. Wilson Ornithological Chapter. (Wilson Ornithological Society, 1931)

The Wilson bulletin - Agassiz Association. Wilson Ornithological Chapter. (Wilson Ornithological Society, 1947)

The Wilson bulletin - Agassiz Association. Wilson Ornithological Chapter. (Wilson Ornithological Society, 1956)

The Wilson bulletin - Agassiz Association. Wilson Ornithological Chapter. (Wilson Ornithological Society, 1962)

The Wilson bulletin - Agassiz Association. Wilson Ornithological Chapter. (Wilson Ornithological Society, 1973)

The Wilson bulletin - Agassiz Association. Wilson Ornithological Chapter. (Wilson Ornithological Society, 1982)

The Wilson bulletin - Agassiz Association. Wilson Ornithological Chapter. (Wilson Ornithological Society, 1987)

The Wilson bulletin - Agassiz Association. Wilson Ornithological Chapter. (Wilson Ornithological Society, 1992)

The Wilson bulletin - Agassiz Association. Wilson Ornithological Chapter. (Wilson Ornithological Society, 1993)

The Wilson bulletin - Agassiz Association. Wilson Ornithological Chapter. (Wilson Ornithological Society, 1997)

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The Wilson bulletin - Agassiz Association. Wilson Ornithological Chapter. (Wilson Ornithological Society, 2000)

The Wilson bulletin - Agassiz Association. Wilson Ornithological Chapter. (Wilson Ornithological Society, 2002)

The Wilson bulletin - Agassiz Association. Wilson Ornithological Chapter. (Wilson Ornithological Society, 2003)

The Wilson bulletin - Agassiz Association. Wilson Ornithological Chapter. (Wilson Ornithological Society, 2005)

The Wilson journal of ornithology - Wilson Ornithological Society (Wilson Ornithological Society, 2006)

The Wilson journal of ornithology - Wilson Ornithological Society (Wilson Ornithological Society, 2007)

The winter bird-life of Minnesota; being an annotated list of birds that have been found within the state of Minnesota during the winter months - Roberts, Thomas S. (Thomas Sadler), 1858 -1946 (1916)

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Year book - Carnegie Institution of Washington - Carnegie Institution of Washington (Carnegie Institution of Washington, 1916)

A year with the birds; a guide to the naming of 100 birds commonly to be seen in Connecticut - Fuertes, Louis Agassiz, 1874 -1927 (1905)

The Yellowstone National Park - Comstock, Theo. B. (Theodore Bryant), 1849 -1915 (1874)

The young oölogist (1884)

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Zeitschrift fur Oologie und Ornithologie (H. Hocke, 1905)

Zeitschrift fur Oologie und Ornithologie (H. Hocke, 1908)

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The Zoological record - Zoological Society of London. (J.V. Voorst, 1901)

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The Zoological record - Zoological Society of London. (J.V. Voorst, 1910)

The Zoological record - Zoological Society of London. (J.V. Voorst, 1918)

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Der Zoologische Garten - International Union of Directors of Zoological Gardens (G. Fischer, Zoologische gesellschaft, 1903)

Zoologische Jahrbücher. Supplementheft (Gustav Fischer, 1893)

Zoologische Jahrbücher. Abteilung für Anatomie und Ontogenie der Tiere. Abteilung für Anatomie und Ontogenie der Tiere (G. Fischer, c -1993, 1914)

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