Robert Ridgway

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A nomenclature of colors for naturalists and compendium of useful knowledge for ornithologists 1886

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Ancient Law Its Connection to the History of Early Society (Edition1)
Ridgway, Robert

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Outlines of a Natural Arrangement of the Falconidae
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Color Standards and Color Nomenclature
Ridgway, Robert

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Nomenclature of North American Birds Chiefly Contained in the United States National Museum...
Ridgway, Robert

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Birds of the Galapagos Archipelago
Ridgway, Robert

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Manual of North American Birds (Classic Reprint)
Robert Ridgway

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The Ornithology of Illinois. Part I. Descriptive Catalogue
Ridgway, Robert

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