Robert Ridgway

On the plains and among the peaks

A History of North American Birds Volume V. 2

A History of North American Birds

Bulletin of the United States National Museum Volume 50

Color Standards and Color Nomenclature... - Scholar's Choice Edition

Birds of the Galapagos Archipelago - Scholar's Choice Edition

Color Standards and Color Nomenclature - Primary Source Edition

Birds of the Galapagos Archipelago - Primary Source Edition

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 Volume 6

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 Volume 7

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 Volume 1

Ornithology

Outlines of a Natural Arrangement of the Falconidae

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 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 Volume 50, No. 4

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 Volume 50, No. 5

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 Volume 50, No. 3

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 Volume 7, No. 1916

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 Volume 5

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 Volume 50, No. 8

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 Volume 50, No. 2

Nomenclature of North American Birds Chiefly Contained in the United States National Museum

The Birds of North and Middle America Volume 4; 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 T

The Birds of North and Middle America Volume 4; 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 Th