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Natural History of the Bell Vireo, Vireo bellii Audubon
Jon C. Barlow
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Food Habits of the Thrushes of the United States
F. E. L. Beal
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The Argus Pheasant
John Charles Beecham
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Birds Found on the Arctic Slope of Northern Alaska
James W. Bee
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Birds Every Child Should Know
Neltje Blanchan
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The Determined Angler and the Brook Trout
Charles Barker Bradford
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Natural History of Cottonmouth Moccasin, Agkistrodon piscovorus (Reptilia)
Ray D. Burkett
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Descriptions of Three New Birds from the Belgian Congo
James Paul Chapin
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Color Key to North American Birds
Frank M. Chapman
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What Bird is That?
Frank M. Chapman
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Bees from British Guiana
Theodore D. A. Cockerell
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A New Pocket Mouse (Genus Perognathus) from Kansas
E. Lendell Cockrum
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Geographic Variation in Red-backed Mice (Genus Clethrionomys) of the Southern Rocky Mountain Region
E. Lendell Cockrum and Kenneth Leonard Fitch
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British Butterflies: Figures and Descriptions of Every Native Species
W. S. Coleman
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Five Natural Hybrid Combinations in Minnows (Cyprinidae)
Frank B. Cross and W. L. Minckley
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Artistic Anatomy of Animals
Édouard Cuyer
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Profitable Squab Breeding
Carl Dare
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A Monograph on the Sub-class Cirripedia (Volume 1 of 2)
Charles Darwin
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Fish Populations, Following a Drought, in the Neosho and Marais des Cygnes Rivers of Kansas
James E. Deacon
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Fishes of the Wakarusa River in Kansas
James E. Deacon and Artie L. Metcalf
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Zoological Mythology; or, The Legends of Animals, Volume 1 (of 2)
Angelo De Gubernatis
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The Mammals of Warren Woods, Berrien County, Michigan
Lee R. Dice
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Notes on the Mammals of Gogebic and Ontonagon Counties, Michigan, 1920
Lee R. Dice and Harley Bakwel Sherman
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Comparative Ecology of Pinyon Mice and Deer Mice in Mesa Verde National Park, Colorado
Charles L. Douglas
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A Review of the Frogs of the Hyla bistincta Group
William Edward Duellman
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