Robert Ridgway – författare

Color Standards and Color Nomenclature, Robert Ridgway ... With Fifty?three Colored Plates and Eleven Hundred and Fifteen Named Colors.

Color Standards and Color Nomenclature

Color Standards and Color Nomenclature

Birds of the Galapagos Archipelago

Birds of the Galapagos Archipelago

Nomenclature of Colors for Naturalists

And Compendium of Useful Knowledge for Ornithologists

Nomenclature of Colors for Naturalists

And Compendium of Useful Knowledge for Ornithologists

Manual of North American Birds

Manual of North American Birds

Nomenclature Of North American Birds Chiefly Contained In The United States National Museum

Nordamerikanische Vogelwelt

Nomenclature Of North American Birds Chiefly Contained In The United States National Museum

Nordamerikanische Vogelwelt

Birds of the World; a Popular Account

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 Caribbe

History Of North American Birds, Volume 2

History Of North American Birds, Volume 3

Ornithology of Illinois Volume 1

Outlines of a Natural Arrangement of the Falconidae

On the plains and among the peaks

How Mrs. Maxwell made her natural history collection

Nord-Amerikanische Vogelwelt

Nordamerikanische Vogelwelt

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 (P

birds of North and Middle America

a descriptive catalog 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 (Par

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 (P