Ridgway's 'The Birds of North and Middle America,' Part VIII 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 America, from the Arctic Lands to the Isthmus of Panama, the West Indies and Other Islands of the Caribbean Sea, and the Galapagos Archipelago Robert Ridgway

• Published in: The Auk
• Format: Article in Journal/Newspaper
• Language: unknown
• Published: Oxford University Press (OUP) 1919
• Subjects: Animal Science and Zoology; Ecology, Evolution, Behavior and Systematics; Arctic; Galapagos
• Online Access: http://dx.doi.org/10.2307/4073396