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)

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With the birds in Maine - Miller, Harriet Mann, 1831 -1918 (Houghton, Mifflin and company, 1904)

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

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World Checklist of Threatened Birds (1993)

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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)

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

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Zoe:a biological journal (Zoe Publishing Co, 1891)

Zoe:a biological journal (Zoe Publishing Co, 1892)

Zoe:a biological journal (Zoe Publishing Co, 1893)

Zoe:a biological journal (Zoe Publishing Co, 1894)

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The Zoological record - Zoological Society of London. (J.V. Voorst, 1904)

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

The Zoological record - Zoological Society of London. (J.V. Voorst, 1907)

The Zoological record - Zoological Society of London. (J.V. Voorst, 1909)

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

The Zoological record - Zoological Society of London. (J.V. Voorst, 1911)

The Zoological record - Zoological Society of London. (J.V. Voorst, 1914)

The Zoological record - Zoological Society of London. (J.V. Voorst, 1915)

The Zoological record - Zoological Society of London. (J.V. Voorst, 1917)

The Zoological record - Zoological Society of London. (J.V. Voorst, 1919)

The Zoological record - Zoological Society of London. (J.V. Voorst, 1920)

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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, 1887)

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Zoologischer Anzeiger - Deutsche Zoologische Gesellschaft. (VEB Gustav Fischer Verlag, 1891)

Zoologischer Anzeiger - Deutsche Zoologische Gesellschaft. (VEB Gustav Fischer Verlag, 1892)

Zoologischer Anzeiger - Deutsche Zoologische Gesellschaft. (VEB Gustav Fischer Verlag, 1894)

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

Zoologischer Anzeiger - Deutsche Zoologische Gesellschaft. (VEB Gustav Fischer Verlag, 1878)

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, 1903)

Zoologischer Anzeiger - Deutsche Zoologische Gesellschaft. (VEB Gustav Fischer Verlag, 1910)

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