La vita degli animali : descrizioni generale del regno animale - Brehm, Alfred Edmund, 1829 -1884 (Società l'Unione Tipografico-Editrice, [1869?-], 1870)

Die Vögel; Handbuch der systematischen Ornithologie - Reichenow, Anton, 1847 -1941 (F. Enke, 1914)

Die Vögel der Arktis - Schalow, Herman, 1852 -1925 (s.n, 1904)

Die Vögel der zoologischen Gärten : Leitfaden zum Studium der Ornithologie mit besonderer Berücksichtigung der in Gefangenschaft gehaltenen Vögel : ein Handbuch für Vogelwirthe - Reichenow, Anton, 1847 -1941 (L.A. Kittler, 1882)

Wake-robin - Burroughs, John, 1837 -1921 (Houghton, Mifflin, 1899)

Wake-Robin - Burroughs, John, 1837 -1921 (Houghton, Mifflin, 1899)

The Warbler (Mayflower Pub. Co, 1906)

The Warbler (Mayflower Pub. Co, 1908)

The Warbler (Mayflower Pub. Co, 1913)

The warblers of North America - Chapman, Frank M. (Frank Michler), 1864 -1945 (D. Appleton, 1914)

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

Ways of nature - Burroughs, John, 1837 -1921 (Houghton, Mifflin and company, 1905)

Ways of nature - Burroughs, John, 1837 -1921 (Houghton Mifflin and Company, 1905)

Ways of nature - Burroughs, John, 1837 -1921 (Houghton Mifflin, 1905)

Western bird guide; birds of the Rockies and west to the Pacific - Reed, Chester A. (Chester Albert), 1876 -1912 (Doubleday, Page & Co, 1913)

Western birds - California Field Ornithologists. (California Field Ornithologists, 1975)

Western birds - California Field Ornithologists. (California Field Ornithologists, 1976)

Western birds - California Field Ornithologists. (California Field Ornithologists, 1977)

Western birds - California Field Ornithologists. (California Field Ornithologists, 1979)

Western birds - California Field Ornithologists. (California Field Ornithologists, 1980)

Western birds - California Field Ornithologists. (California Field Ornithologists, 1993)

Western birds - California Field Ornithologists. (California Field Ornithologists, 1994)

Western birds - California Field Ornithologists. (California Field Ornithologists, 1997)

Western birds - California Field Ornithologists. (California Field Ornithologists, 1998)

Western birds - California Field Ornithologists. (California Field Ornithologists, 2000)

Western birds - California Field Ornithologists. (California Field Ornithologists, 2001)

Western birds - California Field Ornithologists. (California Field Ornithologists, 2002)

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

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

Western birds - California Field Ornithologists. (California Field Ornithologists, 2005)

Western birds - California Field Ornithologists. (California Field Ornithologists, 2007)

Western birds - California Field Ornithologists. (California Field Ornithologists, 2009)

Western birds - California Field Ornithologists. (California Field Ornithologists, 2010)

Western birds - California Field Ornithologists. (California Field Ornithologists, 2011)

Western birds - California Field Ornithologists. (California Field Ornithologists, 2012)

Western birds - California Field Ornithologists. (California Field Ornithologists, 2014)

Western birds - California Field Ornithologists. (California Field Ornithologists, 2015)

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

Wild animals of Glacier National Park. The mammals, with notes on physiography and life zones; The birds - Bailey, Vernon, 1864 -1942 (Govt. print. off, 1918)

Wildbirds of New York / by Chester A. Reed - Reed, Chester A. (Chester Albert), 1876 -1912 (Mohonk salesrooms, 1912)

The Wilson bulletin - Agassiz Association. Wilson Ornithological Chapter. (Wilson Ornithological Society, 1897)

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, 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, 1913)

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, 1921)

The Wilson bulletin - Agassiz Association. Wilson Ornithological Chapter. (Wilson Ornithological Society, 1923)

The Wilson bulletin - Agassiz Association. Wilson Ornithological Chapter. (Wilson Ornithological Society, 1925)

The Wilson bulletin - Agassiz Association. Wilson Ornithological Chapter. (Wilson Ornithological Society, 1926)

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, 1931)

The Wilson bulletin - Agassiz Association. Wilson Ornithological Chapter. (Wilson Ornithological Society, 1933)

The Wilson bulletin - Agassiz Association. Wilson Ornithological Chapter. (Wilson Ornithological Society, 1934)

The Wilson bulletin - Agassiz Association. Wilson Ornithological Chapter. (Wilson Ornithological Society, 1935)

The Wilson bulletin - Agassiz Association. Wilson Ornithological Chapter. (Wilson Ornithological Society, 1936)

The Wilson bulletin - Agassiz Association. Wilson Ornithological Chapter. (Wilson Ornithological Society, 1940)

The Wilson bulletin - Agassiz Association. Wilson Ornithological Chapter. (Wilson Ornithological Society, 1942)

The Wilson bulletin - Agassiz Association. Wilson Ornithological Chapter. (Wilson Ornithological Society, 1944)

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

The Wilson bulletin - Agassiz Association. Wilson Ornithological Chapter. (Wilson Ornithological Society, 1950)

The Wilson bulletin - Agassiz Association. Wilson Ornithological Chapter. (Wilson Ornithological Society, 1951)

The Wilson bulletin - Agassiz Association. Wilson Ornithological Chapter. (Wilson Ornithological Society, 1952)

The Wilson bulletin - Agassiz Association. Wilson Ornithological Chapter. (Wilson Ornithological Society, 1954)

The Wilson bulletin - Agassiz Association. Wilson Ornithological Chapter. (Wilson Ornithological Society, 1955)

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

The Wilson bulletin - Agassiz Association. Wilson Ornithological Chapter. (Wilson Ornithological Society, 1963)

The Wilson bulletin - Agassiz Association. Wilson Ornithological Chapter. (Wilson Ornithological Society, 1967)

The Wilson bulletin - Agassiz Association. Wilson Ornithological Chapter. (Wilson Ornithological Society, 1968)

The Wilson bulletin - Agassiz Association. Wilson Ornithological Chapter. (Wilson Ornithological Society, 1969)

The Wilson bulletin - Agassiz Association. Wilson Ornithological Chapter. (Wilson Ornithological Society, 1971)

The Wilson bulletin - Agassiz Association. Wilson Ornithological Chapter. (Wilson Ornithological Society, 1976)

The Wilson bulletin - Agassiz Association. Wilson Ornithological Chapter. (Wilson Ornithological Society, 1980)

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

The Wilson bulletin - Agassiz Association. Wilson Ornithological Chapter. (Wilson Ornithological Society, 1984)

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

The Wilson bulletin - Agassiz Association. Wilson Ornithological Chapter. (Wilson Ornithological Society, 1990)

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

The Wilson bulletin - Agassiz Association. Wilson Ornithological Chapter. (Wilson Ornithological Society, 1994)

The Wilson bulletin - Agassiz Association. Wilson Ornithological Chapter. (Wilson Ornithological Society, 1995)

The Wilson bulletin - Agassiz Association. Wilson Ornithological Chapter. (Wilson Ornithological Society, 1996)

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

The Wilson bulletin - Agassiz Association. Wilson Ornithological Chapter. (Wilson Ornithological Society, 1999)

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, 2004)

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

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

The Wilson journal of ornithology - Wilson Ornithological Society (Wilson Ornithological Society, 2008)