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)

The Wilson quarterly - Agassiz Association. Wilson Ornithological Chapter. (Wilson Ornithological Chapter of the Agassiz Association, 1892)

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)

Winter sunshine - Burroughs, John, 1837 -1921 (Houghton, Mifflin, 1901)

Winter sunshine - Burroughs, John, 1837 -1921 (Houghton, Mifflin and company, 1901)

Wireworms attacking cereal and forage crops - Hyslop, James Augustus, 1884 -1953 (U.S. Dept. of Agriculture, 1915)

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

The world's birds a simple and popular classification of the birds of the world - Finn, Frank, 1868 -1932 (Hutchinson & co, 1908)

The writings of John Burroughs - Burroughs, John, 1837 -1921 (Houghton, Mifflin, & co, 1895)

The writings of John Burroughs - Burroughs, John, 1837 -1921 (Houghton, Mifflin, & co, 1879)

The writings of John Burroughs - Burroughs, John, 1837 -1921 (Houghton, Mifflin, & co, 1904)

The writings of John Burroughs - Burroughs, John, 1837 -1921 (Houghton, Mifflin, & co, 1905)

The writings of John Burroughs - Burroughs, John, 1837 -1921 (Houghton, Mifflin, & co, 1913)

The writings of John Burroughs. [v.1-20 - Burroughs, John, 1837 -1921 (Houghton, Mifflin and Co, 1904)

Year book - Carnegie Institution of Washington - Carnegie Institution of Washington (Carnegie Institution of Washington, 1915)

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)

Yearbook of agriculture - United States. Department of Agriculture. (U.S. Govt. Print. Off, 1896)

Yearbook of agriculture - United States. Department of Agriculture. (U.S. Govt. Print. Off, 1906)

Young's Point Provincial Park and Williamson Provincial Park management plan - Alberta. Alberta Community Development. (Alberta Community Development, Parks and Protected Areas, 2003)

Zeitschrift für die gesammten Naturwissenschaft - Naturwissenschaftlicher Verein für Sachsen und Thüringen in Halle. (Wiegandt, Hempel & Parey, 1870)

Zeitschrift für Naturwissenschaften - Naturwissenschaftlicher Verein für Sachsen und Thüringen in Halle. (Verlag Naturwissenschaftlichen Vereins für Sachsen und Thüringen, 1911)

Zeitschrift fur Oologie (H. Hocke, 1891)

Zeitschrift fur Oologie (H. Hocke, 1892)

Zeitschrift fur Oologie (H. Hocke, 1893)

Zeitschrift fur Oologie (H. Hocke, 1894)

Zentralblatt für Zoologie, allgemeine und experimentelle Biologie (B.G. Teubner, 1915)

Zoologica : scientific contributions of the New York Zoological Society - New York Zoological Society. (1911)

Zoologica : scientific contributions of the New York Zoological Society - New York Zoological Society. (1914)

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. (1969)

The zoological quarterly bulletin - Surface, H. A. (Harvey Adam), 1867 -1941 (Wm. Stanley Ray, state printer of Pennsylvania, 1904)

The Zoological record - Zoological Society of London. (J.V. Voorst, 1896)

The Zoological record - Zoological Society of London. (J.V. Voorst, 1897)

The Zoological record - Zoological Society of London. (J.V. Voorst, 1905)

The Zoological record - Zoological Society of London. (J.V. Voorst, 1906)

The Zoological record - Zoological Society of London. (J.V. Voorst, 1908)

The Zoological record - Zoological Society of London. (J.V. Voorst, 1921)

Zoological series - Geological; Natural History Survey of Minnesota. (Geological and Natural History Survey, 1892)

Zoological Society bulletin - New York Zoological Society. (New York Zoological Society, 1917)

Der Zoologische Garten - International Union of Directors of Zoological Gardens (G. Fischer, Zoologische gesellschaft, 1872)

Der Zoologische Garten - International Union of Directors of Zoological Gardens (G. Fischer, Zoologische gesellschaft, 1886)

Der Zoologische Garten - International Union of Directors of Zoological Gardens (G. Fischer, Zoologische gesellschaft, 1894)

Der Zoologische Garten - International Union of Directors of Zoological Gardens (G. Fischer, Zoologische gesellschaft, 1897)

Der Zoologische Garten - International Union of Directors of Zoological Gardens (G. Fischer, Zoologische gesellschaft, 1898)

Der Zoologische Garten - International Union of Directors of Zoological Gardens (G. Fischer, Zoologische gesellschaft, 1900)

Der Zoologische Garten - International Union of Directors of Zoological Gardens (G. Fischer, Zoologische gesellschaft, 1901)

Zoologischer Anzeiger - Deutsche Zoologische Gesellschaft. (VEB Gustav Fischer Verlag, 1888)

Zoologischer Anzeiger - Deutsche Zoologische Gesellschaft. (VEB Gustav Fischer Verlag, 1893)

Zoologischer Anzeiger - Deutsche Zoologische Gesellschaft. (VEB Gustav Fischer Verlag, 1898)

The Zoologist : a monthly journal of natural history (1885)

The Zoologist : a monthly journal of natural history (1897)