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

The woodpeckers - Fuertes, Louis Agassiz, 1874 -1927 (Houghton, Mifflin and company, 1901)

Woodpeckers in relation to trees and wood products - McAtee, W. L. (Waldo Lee) 1883 -1962 (U.S. Dept. of Agriculture, Biological Survey, 1911)

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

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, 1895)

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

Yearbook of agriculture - United States. Department of Agriculture. (U.S. Govt. Print. Off, 1897)

Yearbook of agriculture - United States. Department of Agriculture. (U.S. Govt. Print. Off, 1900)

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

Yearbook of agriculture - United States. Department of Agriculture. (U.S. Govt. Print. Off, 1911)

Yearbook of the United States Department of Agriculture - United States. Department of Agriculture. (Govt. Print. Off, 1906)

Zeitschrift für Säugetierkunde : im Auftrage der Deutschen Gesellschaft für Säugetierkunde e.V - Deutsche Gesellschaft für Säugetierkunde (Die Gesellschaft, 1926)

zhong guo jin ji kun chong xue.zeng ding ban 中国经济昆虫学.增订版 - Li, Fengsun 李凤荪 (bian zhe zi kan 编者自刊, 1951)

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

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

Zoologica (Erwin Nägele, 1906)

Zoologica : scientific contributions of the New York Zoological Society - New York Zoological Society. (1946)

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, 1886)

The Zoological record - Zoological Society of London. (J.V. Voorst, 1887)

The Zoological record - Zoological Society of London. (J.V. Voorst, 1888)

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, 1899)

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

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

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

The Zoological record - Zoological Society of London. (J.V. Voorst, 1912)

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

The Zoological record - Zoological Society of London. (J.V. Voorst, 1916)

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)

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

The Zoological record - Zoological Society of London. (J.V. Voorst, 1922)

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

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

Zoologischer Anzeiger - Deutsche Zoologische Gesellschaft. (VEB Gustav Fischer Verlag, 1887)

Zoologischer Anzeiger - Deutsche Zoologische Gesellschaft. (VEB Gustav Fischer Verlag, 1923)

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, 1898)

Zoologisches Centralblatt (W. Engelmann, 1894)

Zoologisches Centralblatt (W. Engelmann, 1896)

Zoology of Colorado - Cockerell, Theodore D. A. (Theodore Dru Alison), 1866 -1948 (University of Colorado, 1927)