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

The Wilson bulletin - Agassiz Association. Wilson Ornithological Chapter. (Wilson Ornithological Society, 1988)

The Wilson bulletin - Agassiz Association. Wilson Ornithological Chapter. (Wilson Ornithological Society, 1989)

The Wilson bulletin - Agassiz Association. Wilson Ornithological Chapter. (Wilson Ornithological Society, 1991)

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, 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, 1998)

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, 2006)

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

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

The Wilson journal of ornithology - Wilson Ornithological Society (Wilson Ornithological Society, 2009)

The Wilson journal of ornithology - Wilson Ornithological Society (Wilson Ornithological Society, 2010)

The Wilson journal of ornithology - Wilson Ornithological Society (Wilson Ornithological Society, 2011)

The Wilson journal of ornithology - Wilson Ornithological Society (Wilson Ornithological Society, 2012)

Wonders of the bird world - Sharpe, Richard Bowdler, 1847 -1909 (Frederick A. Stokes company, 1921)

Woodpeckers of the world - Short, Lester L. (Delaware Museum of Natural History, 1982)

World Checklist of Threatened Birds (1993)

World Checklist of Threatened Birds (1990)

The world of life; a manifestation of creative power, directive mind and ultimate purpose - Wallace, Alfred Russel, 1823 -1913 (Moffat, Yard, 1911)

The world of life : a manifestation of creative power, directive mind and ultimate purpose - Wallace, Alfred Russel, 1823 -1913 (Chapman and Hall, 1914)

The world of life; a manifestation of creative power, directive mind and ultimate purpose - Wallace, Alfred Russel, 1823 -1913 (Chapman and Hall, 1911)

Wyoming birds and their value to agriculture - Grave, B. H. (Benjamin Harrison), 1878 -1949 (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)

Yosemite nature notes - United States. National Park Service. (Yosemite Natural History Association, 1922)

Zeitschrift für die gesammte Ornithologie - Madarász, Gyula, 1858 -1931 (Franklin-Verein, 1887)

Zeitschrift für die gesammten Naturwissenschaft - Naturwissenschaftlicher Verein für Sachsen und Thüringen in Halle. (Wiegandt, Hempel & Parey, 1872)

Zeitschrift für Naturwissenschaften - Naturwissenschaftlicher Verein für Sachsen und Thüringen in Halle. (Verlag Naturwissenschaftlichen Vereins für Sachsen und Thüringen, 1898)

Zentralblatt für Zoologie, allgemeine und experimentelle Biologie (B.G. Teubner, 1913)

Zitteliana - Bayerische Staatssammlung für Paläontologie und Historische Geologie München (Komissionsverlag Geiselberger [etc.], 1969)

Zoología - Claus, Carl, 1835 -1899 (Imprenta y litografía de F. Nacente, 1891)

Zoologica : scientific contributions of the New York Zoological Society - New York Zoological Society. (1909)

Zoologica : scientific contributions of the New York Zoological Society - New York Zoological Society. (1907)

Zoologica : scientific contributions of the New York Zoological Society - New York Zoological Society. (1916)

Zoologica : scientific contributions of the New York Zoological Society - New York Zoological Society. (1925)

Zoologica : scientific contributions of the New York Zoological Society - New York Zoological Society. (1950)

Zoologica : scientific contributions of the New York Zoological Society - New York Zoological Society. (1952)

Zoologica : scientific contributions of the New York Zoological Society - New York Zoological Society. (1962)

Zoologica : scientific contributions of the New York Zoological Society - New York Zoological Society. (1964)

Zoological bibliography, or, Opera zoologica (Aves Press Ltd, 2014)

Zoological classification; a handy book of reference with tables of the subkingdoms, classes, orders, etc., of the animal kingdom, their characters and lists of the families and principal genera - Pascoe, Francis Polkinghorne, 1813 -1893 (J. Van Voorst, 1880)

The Zoological record - Zoological Society of London. (J.V. Voorst, 1870)

The Zoological record - Zoological Society of London. (J.V. Voorst, 1872)

The Zoological record - Zoological Society of London. (J.V. Voorst, 1876)

The Zoological record - Zoological Society of London. (J.V. Voorst, 1894)

The Zoological record - Zoological Society of London. (J.V. Voorst, 1895)