Robert Ridgway

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A Nomenclature of Colors for Naturalists: And Compendium of Useful Knowledge for Ornithologists
Ridgway, Robert

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Color Standards and Color Nomenclature
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The Birds Of North And Middle America: A Descriptive Catalogue Of The Higher Groups, Genera, Species, And Subspecies Of Birds Known To Occur In North ... The West Indies And Other Islands Of The
Ridgway, Robert; Friedmann, Herbert

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Nomenclature Of North American Birds: Chiefly Contained In The United States National Museum (1881)
Ridgway, Robert

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Birds Of The Galapagos Archipelago...
Ridgway, Robert

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Outlines of a Natural Arrangement of the Falconidae
Ridgway, Robert

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The Birds of North and Middle America: A Descriptive Catalogue of the Higher Groups, Genera, Species, and Subspecies of Birds Known to Occur in North ... Islands of the Caribbean Sea ( V.1 ) [1901]
Ridgway, Robert

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Die Nordamerikanische Vogelwelt
Ridgway, Robert; Nehrling, Henry

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