Key to North American birds :
containing a concise account of every species of living and fossil bird at present known from the continent north of the Mexican and United States boundary : illustrated by 6 steel plates and upwards of 250 woodcuts /
by Elliott Coues, Assistant Surgeon United States Army.
APA Citation
Coues, E. (1872). Key to North American birds: containing a concise account of every species of living and fossil bird at present known from the continent north of the Mexican and United States boundary : illustrated by 6 steel plates and upwards of 250 woodcuts. Salem: Naturalists' Agency.
MLA Citation
Coues, Elliott, 1842-1899. Key to North American Birds: Containing a Concise Account of Every Species of Living And Fossil Bird At Present Known From the Continent North of the Mexican And United States Boundary : Illustrated by 6 Steel Plates And Upwards of 250 Woodcuts. Salem: Naturalists' Agency, 1872.
Warning: These citations may not always be complete (especially for serials).